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10 Dangerous Ways to Amuse Yourself from an 1820 Book

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The second edition of Endless Amusement, published in 1820, promises “nearly 400 entertaining experiments in various branches of science.” It’s not clear who, exactly, the book was for, but we can assume it wasn’t for kids: A number of these experiments sound pretty dangerous, and that's not even including the section devoted to DIY fireworks, “so clearly explained, as to be within the reach of the most limited capacity." Here are a few experiments the publisher advocated trying at home—though you probably shouldn’t.

1. Artificial Earthquake and Volcano

This fun party trick required a person to bury 30 pounds of iron filings and sulfur, and wait for their mini-Vesuvius to rise. What could go wrong?

Grind an equal quantity of fresh iron filings with pure sulphur, till the whole be reduced to a fine powder. Be careful not to let any wet come near it. Then bury about thirty pounds of it a foot deep in the earth, and in about six or eight hours the ground will heave and swell, and shortly after send forth smoke and flames like a burning mountain.

“If the earth is raised in a conical shape,” the instructions conclude, “it will be no bad miniature resemblance of one of the burning mountains.” Fun! (?)

2. The Fiery Fountain

Is there a purpose, scientific or otherwise, for turning a traditional fountain into a fiery one? Who knows, but it probably looked pretty cool. Readers could pull off the affect by following these instructions:

If twenty grains of phosphorus, cut very small, and mixed with forty grains of powder of zinc, be put into four drachms of water ; and two drachms of concentrated sulphuric acid, be added thereto, bubbles of inflamed phosphorated hydrogen gas will quickly cover the whole surface of the fluid in succession, forming a real fountain of fire.

3. To Cause a Brilliant Explosion Under Water

To create what sounds like a mini-explosion, readers simply had to “drop a piece of phosphorus, the size of a pea, into a tumbler of hot water.” Using a bladder “furnished with a stop cock,” they forced oxygen onto the phosphorus. Doing so created "a most brilliant combustion under water.”

4. To set Fire to a combustible Body by Reflection

Presumably, ants were the first victims of the people who came up with this experiment. When insects became boring, they moved on to coal and gunpowder:

Place two concave mirrors at about twelve feet distance from each other, and let the axis of each be in the same line. In the focus of one of them place a live coal, and in the focus of the other some gunpowder. With a pair of strong bellows keep blowing the coal, and notwithstanding the distance between them, the powder will presently take fire. The mirror may be either made of glass, metal or pasteboard gilt.

5. Bottles Broken By Air

This experiment is filed under a section called “interesting experiments with an airpump.” “We shall not occupy the time of our readers by describing the form and nature of the air pump,” the publisher notes, “since those persons whose circumstances will enable them to have it, can purchase it properly made at an optician's, at less expense, and with far less trouble, than they can construct, or cause it to be constructed, themselves.”

So what, exactly, do you use an air pump for? Breaking things, including bottles. For science:

Take a square bottle of thin glass, and of any size. Apply it to the hole in the air pump, and exhaust the air. The bottle will sustain the weight of the external air as long as it is able, but at length it will suddenly burst into very small particles, and with a loud explosion.

An opposite effect will be produced, if the mouth of a bottle be sealed so close that no air can escape ; then place it in the receiver, and exhaust the air from its surface. The air which is confined within the bottle, when the external air is drawn off, will act so powerfully as to break the bottle into pieces.

6. Candle Bombs

This one—sort of like a modified Molotov cocktail—required “some small glass bubbles, having a neck about an inch long, with very slender bores.” The reader poured a small quantity of water through the bores, then sealed them up. When he put the "stalk through the wick of a burning candle, the flame boils the water into a steam, and the glass is broken with a loud explosion.”

7. Magical Explosion

There are many explosions in the book, but this one is labeled magical probably because it was caused by electricity:

Make up some gunpowder, in the form of a small cartridge, in each end of which put a blunt wire, so that the ends inside of the cartridge be about half an inch of each other ; then joining the chain that proceeds from one side of the electrifying battery, to the wire at the other end, the shock will instantly pass through the powder, and set it on fire.

8. The Unconscious Incendiary

Mercy on the poor soul who served as the subject of this totally safe-sounding experiment:

Let a person stand upon a stool made of baked wood, or upon a cake of wax, and hold a chain which communicates with the branch. On turning the wheel he will become electrified ; his whole body forming part of the prime conductor ; and he will emit sparks whenever he is touched by a person standing on the floor.

If the electrified person put his finger, or a rod of iron, into a dish containing warm spirits of wine, it will be immediately in a blaze ; and, if there be a wick or thread in the spirit, that communicates with a train of gunpowder, he may be made to blow up a magazine, or set a city on fire, with a piece of cold iron, and at the same time be ignorant of the mischief he is doing.

9. Exploding Bubble

Though this experiment involves glass that shatters, the publisher swears that it won’t harm anyone involved:

If you take up a small quantity of melted glass with a tube, (the bowl of a common tobacco pipe will do,) and let a drop fall into a vessel of water, it will chill and condense with a fine spiral tail, which being broken, the whole substance will burst with a loud explosion, without injury either to the party that holds it, or him that breaks it ; but if the thick end is struck even with a hammer, it will not break.

10. Exploding Salt

This experiment promises not just a “considerable explosion” but a “strong odour,” probably making it a favorite among boys and men alike:

If a small quantity of powdered charcoal and hyperoxymuriate of potash be rubbed together in a mortar, an explosion will be produced, and the charcoal inflamed. Three-parts of this salt, and one of sulphur, rubbed together in a mortar, produce a violent detonation. If struck with a hammer on an anvil, there is an explosion like the report of a pistol.

When concentrated sulfuric acid is poured upon this salt, there is a considerable explosion ; it is thrown about to a great distance, sometimes with a red flame ; and there is exhaled a brown vapour, accompanied with a strong odour.

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iStock // Ekaterina Minaeva
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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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Amazon
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This Week's Best Amazon Deals You Can Still Get
May 28, 2017
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Amazon

As a recurring feature, we share some amazing Amazon deals we’ve turned up. These items were the ones that were the most popular with our readers this week, and they’re still available.

Mental Floss has affiliate relationships with certain retailers (including Amazon) and may receive a small percentage of any sale. But we only get commission on items you buy and don’t return, so we’re only happy if you’re happy. Good luck deal hunting! 

GADGETS, TOYS, AND MEDIA

EasyAcc 6000mAh MFi Slim Compact Power Bank, Built-in MFi Cable for Apple Lightning Devices, iPhones, iPads, iPods, and USB Port for Universal USB devices for $18.39 (list price $49.99)

WizGear Universal Air Vent Magnetic Car Mount Holder with Fast Swift-Snap Technology for Smartphones and Mini Tablets, Black for $6.99 (list price $18.99)

HQDmall Fidget Cube Anxiety Stress Relief And Relieves Stress Attention Focus for Children and Adults Anxiety Attention Toy, Black for $7.99 (list price $29.99)

SENSO Bluetooth Headphones, Best Wireless Sports Earphones w/ Mic IPX7 Waterproof HD Stereo Sweatproof Earbuds for Gym Running Workout 8 Hour Battery Noise Cancelling Headsets for $36.97 (list price $169.99)

Fitbit Flex 2, Black (US Version) for $59.95 (list price $99.95)

Anker PowerCore Fusion 5000 2-in-1 Portable Charger and Wall Charger, AC Plug with 5000mAh Capacity, PowerIQ Technology, For iPhone, iPad, Android, Samsung Galaxy and More for $21.99 (list price $50.99)

Anker 60W 6-Port USB Wall Charger, PowerPort 6 for iPhone 7 / 6s / Plus, iPad Pro / Air 2 / mini, Galaxy S7 / S6 / Edge / Plus, Note 5 / 4, LG, Nexus, HTC and More for $25.99 (list price $79.99)

AELEC S350 Bluetooth Headphones Wireless In-Ear Sports Earbuds Sweatproof Earphones Noise Cancelling Headsets with Mic for Running Jogging for $21.99 (list price $129.99)

SoundPEATS Bluetooth Headset V4.1 Wireless Earbud Mini In-ear Bluetooth Earpiece Car Headset Hand-free calling with Mic for iPhone/Android/Windows 10 Cellphones, Tablets and Computers (Black) for $15.29 (list price $39.99)

TaoTronics Bluetooth Receiver / Car Kit, Portable Wireless Audio Adapter 3.5 mm Stereo Output (Bluetooth 4.0, A2DP, Built-in Microphone) for Home Audio Music Streaming Sound System for $13.49 (list price $15.99)

Seagate Backup Plus 4TB Portable External Hard Drive USB 3.0, Silver (STDR4000900) for $109.99 (list price $129.99)

Funko POP TV: Golden Girls Dorothy Action Figure for $9.00 (list price $12.00)

LEGO STAR WARS TIE Striker 75154 for $45.88 (list price $69.99)

Ace Armor Shield (6 PACK) Screen Protector for the Fitbit Alta HR with free lifetime Replacement warranty for $7.85 (list price $11.99)

VicTsing Shower Speaker, Wireless Waterproof Speaker with 5W Driver, Suction Cup, Buit-in Mic, Hands-Free Speakerphone-Gray for $20.99 (list price $24.99)

Seagate Expansion 2TB Portable External Hard Drive USB 3.0 (STEA2000400) for $69.99 (list price $73.99)

Anker Bluetooth Folio Keyboard Case for iPad Air 2 - Smart Case with Auto Sleep / Wake, Comfortable Keys and 6-Month Battery Life Between Charges (Not compatible with iPad 9.7 inch/iPad Air) for $35.99 (list price $69.99)

Anker 2.4G Wireless Vertical Ergonomic Optical Mouse, 800 / 1200 /1600DPI, 5 Buttons - Black for $19.99 (list price $49.99)

FRiEQ Universal Waterproof Case for Outdoor Activities - Waterproof bag for Apple iPhone 7, 7 Plus, 6S, 6S Plus, 6, 6 Plus, 5S; Galaxy S6, S4; HTC One X, Galaxy Note 3, Note 2; LG G2 - IPX8 Certified to 100 Feet (Black) for $6.99 (list price $19.99)

Fritesla 20000mah Power Bank 4USB Portable Charger for Smartphones (Green) for $24.99 (list price $100.00)

KITCHEN

Moscow Mule Hammered Copper 18 Ounce Drinking Mug, Set of 4 for $21.48 (list price $40.00)

OXO Good Grips Nylon Potato Masher for Non-Stick Cookware for $6.99 (list price $9.59)

Imarku Pro Kitchen 8 inch Chef's Knife High Carbon Stainless Steel Sharp Knives Ergonomic Equipment for $29.99 (list price $99.99)

Lodge L9OG3 Cast Iron Round Griddle, Pre-Seasoned, 10.5-inch for $16.19 (list price $24.00)

Cuisinart CSBP-100 3-in-1 Stuffed Burger Press for $11.47 (list price $14.99)

Wilton Nonstick 6-Cavity Donut Pan for $8.15 (list price $9.99)

Cuisinart Set of 3 Fine Mesh Stainless Steel Strainers, CTG-00-3MS for $11.21 (list price $22.00)

BLACK+DECKER GD2011B Family Sized Electric Griddle, 20 x 11-Inch, Black for $16.57 (list price $39.99)

Circulon Sunrise Whistling Teakettles, 1.5-Quart, Black for $19.99 (list price $40.00)

Rachael Ray Cucina Hard Porcelain Enamel Nonstick Covered Round Casserole, 4.5-Quart, Agave Blue for $27.69 (list price $100.00)

VonShef 7- Egg Electric Cooker Stainless Steel with Poacher & Steamer Attachment for $19.94 (list price $34.99)

The Original GORILLA GRIP (TM) Set of 3 Non-Slip Reversible Cutting Boards, BPA Free, FDA Approved Materials (Set of 3 Boards: Green) for $19.99 (list price $39.99)

Presto 04820 PopLite Hot Air Popper for $17.55 (list price $29.99)

Contigo AUTOSEAL Transit Stainless Steel Travel Mug, 16 oz, Polar White with Grayed Jade Lid Accent for $15.55 (list price $24.99)

AUTOSPOUT Straw Ashland, 24oz, Monaco for $8.49 (list price $12.99)

HOME

URPOWER 2nd Version Essential Oil Diffuser, 100ml Aroma Essential Oil Cool Mist Humidifier with Adjustable Mist Mode,Waterless Auto Shut-off and 7 Color LED Lights Changing for Home Office Baby for $15.95 (list price $39.99)

Radha Beauty Aromatherapy Top 6 Essential Oils 100% Pure & Therapeutic grade - Basic Sampler Gift Set & Premium Kit - 6/10 Ml (Lavender, Tea Tree, Eucalyptus, Lemongrass, Orange, Peppermint) for $14.95 (list price $79.99)

Sherpa Throw Blanket Lt Grey 50x60 Reversible Fuzzy Microfiber All Season Blanket for Bed or Couch by Bedsure for $23.99 (list price $59.99)

Hoover Vacuum Cleaner WindTunnel 3 High Performance Pet Bagless Corded Upright Vacuum UH72630PC for $139.51 (list price $189.99)

LANGRIA Shredded Memory Foam Pillow Firm for Optimal Orthopedic Support, Removable Washable Bamboo Cover Hypoallergenic Anti-Bacterial CertiPUR-US Certification,Queen Size for $12.99 (list price $59.99)

Downy Unstopables In-Wash Scent Booster Beads - FRESH, 26.5 oz. for $10.97 (list price $15.99)

Aszaro Cedar Balls, Cedar Cubes & Cedar Sachets 40 pc Combo Pack | 20 Natural Cedar Wood Balls, 20 Blocks & 5 Bonus Sachets | Ward Off Moths, Mildew And Mustiness For Easy Garment Care for $17.97 (list price $25.99)

Garment Steamer, Holan Portable Handheld Clothes Steamer, Fast Heat-up and 200ml Capacity Fabric Steamer with Two Brushes Perfect for Home and Travel for $17.99 (list price $39.90)

Monkey Hook Picture Hanger Home and Office Pack, 30 pc set for $11.25 (list price $19.75)

Queen Size SafeRest Premium Hypoallergenic Waterproof Mattress Protector - Vinyl Free for $29.95 (list price $95.98)

LUCID Premium Hypoallergenic 100% Waterproof Mattress Protector - 15 Year Warranty - Vinyl Free - Queen for $19.99 (list price $40.00)

HANSLIN Desk Top Swivel Alarm Clock for $23.75 (list price $29.99)

WBM Himalayan Glow 1002 Hand Carved Natural Salt Lamp with Genuine Neem Wood Base/Bulb and Dimmer Control, Crystal, Amber, 8 - 9-Inch, 8 - 11 lb for $30.98 (list price $39.95)

 

HEALTH AND BEAUTY

BS-MALL Makeup Brushes Premium Makeup Brush Set Synthetic Kabuki Cosmetics Foundation Blending Blush Eyeliner Face Powder Brush Makeup Brush Kit (10pcs, Golden Black) for $9.99 (list price $39.99)

Nerdwax Stop Slipping Glasses as Seen on Shark Tank for $10.99 (list price $14.99)

Crest 3D White Luxe Whitestrip Teeth Whitening Kit, Glamorous White, 14 Treatments - Packaging May Vary for $34.69 (list price $44.99)

Gillette Fusion Manual Men’s Razor Blade Refills, 12 Count, Mens Razors / Blades for $33.97 (list price $47.99)

Neutrogena Ultra Sheer Dry-Touch Sunscreen, Broad Spectrum Spf 45, 3 Fl. Oz., Pack Of 2 for $11.24 (list price $14.99)

Neutrogena Ultra Sheer Body Mist Sunscreen, Broad Spectrum Spf 30, 5 Oz. for $7.47 (list price $10.99)

Thinksport Kid's Safe Sunscreen SPF 50+, 3oz for $10.87 (list price $11.99)

Colgate MaxFresh Wisp Disposable Travel Toothbrush, Peppermint - 24 Count for $3.41 (list price $7.99)

100% Pure Australian Tea Tree Essential Oil with 45% Terpinen-4-ol, 1 fl. oz. A Known Solution to Help in Fighting Acne, Toenail Fungus, Dandruff, Yeast Infections, Cold Sores.. for $10.95 (list price $65.00)

American Crew Forming Cream, 3 Ounce for $7.95 (list price $9.67)

Aquasentials Mesh Pouf Bath Sponge (8 Pack) for $8.49 (list price $12.99)

Neutrogena Oil-Free Acne Wash Redness Soothing Facial Cleanser With Salicylic Acid, 6 Fl. Oz. for $6.50 (list price $10.69)

Edge Shave Gel for Men Sensitive Skin - 7 Ounce (Pack of 6) for $17.82 (list price $26.99)

NIVEA Men Platinum Protect 3-in-1 Body Wash 16.9 Fluid Ounce for $3.11 (list price $4.99)

Gillette Fusion ProGlide Manual Men's Razor Blade Refills, 4 Count, Mens Razors / Blades for $13.22 (list price $18.03)

Radha Beauty Rosehip Oil 4 oz - 100% Pure Cold Pressed Certified Organic for $13.95 (list price $49.99)

OFFICE, SCHOOL, AND CRAFTS

SwissGear 1900 Scansmart TSA Laptop Backpack - Black for $54.99 (list price $130.00)

Cardinal by TOPS Products OneStep Printable Table of Contents and Index Dividers, 52-Tab, Numbered, Multi-Color (60990) for $7.15 (list price $11.51)

Chartpak Self-Adhesive Vinyl Capital Letters, 6 Inches High, Black, 38 per Pack (01184) for $16.65 (list price $21.99)

Fineliner Color Pen Set,0.38mm Colored Fine Line Point,Assorted Colors,10-Count for $6.58 (list price $9.99)

uni-ball 207 Impact Gel Pens, Bold Point (1.0mm), Blue, 12 Count for $20.00 (list price $26.46)

Elmer's Liquid School Glue, Washable, 1 Gallon, 1 Count for $14.08 (list price $20.49)

Westcott Jumbo Circles Template (T-826) for $4.31 (list price $7.00)

Amzdeal Magnifier Eye Glasseses Eye Loupe For Reading Drawing Making handicrafts Repairing for $11.89 (list price $39.99)

OUTDOORS, GARDEN, AND SPORTS

Coleman 12 oz. Enamel Mug for $3.49 (list price $8.98)

Igloo 5 Gallon Seat Top Beverage Jug with spigot for $22.99 (list price $39.99)

Mountainsmith Pinnacle Single Trekking Poles, Evergreen for $12.91 (list price $19.95)

Polar Bottle Insulated Water Bottle (24-Ounce) (White) for $7.99 (list price $11.99)

ALPS Mountaineering Crescent Lake 0-Degree Sleeping Bag (Regular) for $43.19 (list price $53.99)

Tapirus Extendable Marshmallow Roasting 4 Camping Sticks | Durable Stainless Steel Equipment BBQ Skewers With Insulated Handles | Telescopic Campfire Forks Utensils For Smores, Hot Dogs & Shish Kebabs for $14.95 (list price $25.99)

OUTERDO Monocular Dual Focus Telescope Camping Wildlife Hunting Surveillance Sporting Events Traveling Scope Waterproof Optics Zoom Bright and Clear with 10 Magnification 16x52 for $12.99 (list price $18.89)

TaylorMade 2016 Tour Preferred Golf Balls (1 Dozen) for $27.99 (list price $39.00)

VicTsing 50ft Expanding Hose, Strongest Expandable Garden Hose with Double Latex Core, Solid Brass Connector and Extra Strength Fabric for Car Garden Hose Nozzle for $34.99 (list price $39.99)

Insulated Picnic Basket - Lunch Tote Cooler Backpack w/ Flatware Two Place Setting (Black & Red) for $25.99 (list price $31.04)

Ekogrips BBQ Oven Gloves | Best Versatile Heat Resistant Grill Gloves | Lifetime Replacement | Insulated Silicone Oven Mitts For Grilling | Waterproof | Full Finger, Hand, Wrist Protection | 3 Sizes for $18.27 (list price $57.99)

Lightning Nuggets Inc 0-47815-14175-7 12-Count Firestarters for $5.54 (list price $12.99)

Imarku BBQ Grill & Baking Mats, Durable , Heat Resistant, Set of 10 Non-Stick Grilling Accessories for $23.99 (list price $49.99)

TOOLS

TIWIN LED Light Bulbs 100 watt equivalent (11W),Soft White (2700K), General Purpose A19 LED Bulbs,E26 Base ,UL Listed, Pack of 6 for $19.99 (list price $23.99)

Kidde FA110 Multi Purpose Fire Extinguisher 1A10BC, 1 Pack for $19.98 (list price $42.99)

Sugru Moldable Glue - Black & White (Pack of 8) for $14.80 (list price $21.25)

5 Pack Ipow LED Battery-powered Wireless Night Light Stick Tap Touch Lamp Stick-on Push Light for Closets, Cabinets, Counters, or Utility Rooms,Cordless Touch Light,Batteris Not Included for $9.97 (list price $11.99)

Dimmable LED Desk Lamp, 4 Lighting Modes(Studying, Reading, Relaxing, Sleeping), 5 Level Dimming, 1 Hour Auto Timer, Touch Sensitive Control, Modern, - Piano Black for $29.97 (list price $109.00)

KEDSUM 200pcs Adhesive Cable Clips, Wire Clips, Car Cable Organizer, Cable Wire Management, Drop Cable Clamp Wire Cord Tie Holder for Car, Office and Home for $8.99 (list price $19.99)

GlowBowl A-00452-01 Motion Activated Toilet Nightlight for $10.40 (list price $24.99)

Mothers 07240 California Gold Clay Bar System for $14.24 (list price $15.37)

J5 Tactical V1-Pro Flashlight The Original 300 Lumen Ultra Bright, LED 3 Mode Flashlight for $12.95 (list price $29.95)

Oria Precision Screwdriver Set, 60 in 1 Magnetic Driver Kit with 54 Bits, Professional Electronics Repair Tool Kit for iPhone/ Cell Phone/ iPad/ Tablet/ PC/ MacBook and Other Electronics for $13.99 (list price $26.99)

SE MH1047L Illuminated Multi-Power LED Head Magnifier for $8.94 (list price $15.44)

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