INDKX TO VOLUME iH
��Page "Stretching" a Pound of Butter to Make Two
Pounds 539
Self-Contained Hot Water Foot Warmer 602
Circulating Air in Room to Warm It Evenly 602
How to Repair a Worn Wash Bowl Plug 611
Control Water in Bath Tub 612
Portable Smoke-House 673
An Electric Cooker for the Kitchenette 673
Keyhole Finder 677
Housekeeping Made Easy 680—681
Converting Ordinary Chair Into High Chair 706
A Baby-in-the-Tree-Top Hammock 738
Safe Ladder 744
A Simple and Effective Heat-Economizing Stove 746
Housekeeping Made Easy 840-41
You Can Carry It in Your Hand and It Saves Fuel 880 Making Window-Cleaning Safe 903
INDUSTRIAL PROGRESS
A Los Angeles Newsboy Increased Business 24
Where Your Bond Money Went 28
Weighing Goods in the Air 35
Utilizing the Garbage to Conserve the Heat Supply 38
Master Craftsmen, Navy-Made 44
Office Appliances 52
An American Fortune Spent for an English Inven- tion 79
Making Millions Out of Bubbles 82
Making Rope . 168-169
Some Unusual Occupations 1 72- 1 73
Making Jeweled Combs 175
England's Heroines Are in Her Ammunition Plants 178
Preparing Commercial Isinglass 182-183
Knit, and Let the Machine Knit Too 194
Reducing the Egg Loss Due to Breakage in Ship- ment 207
A Store That Runs Itself 209
A Machine Presses Newspapers into Bricks for
Burning 214
Little Winston-Salem Is Our BiggestTobacco Center 255 Wood Flour Is a New Product Made from Sawdust 275
Making a Ram Drive a Cream Separator 280
Making Bone Black from Scraps of Leather ..... 282 Qualities of Steel and Wrought Iron for Plumbing 283 Where Fiber May Be Used as a Fireproof Material 314 Invention of New Steel Like Military Victory. . . . 325
Packing Sardines 330
New Idea in Hospital Building 346
America Needs Potash 362
Baling Waste Paper 369
Weaving Rubber-Coated Fabric in Auto Tires. . . . 387
Office Appliances 395
Merits of the Wooden Barrel 400
Varnish and Varnishing 402
We Are Making Our Own Indigo Now 405
Wherein a Head and a Little Ingenuity Save Much
Work 409
Raising Sponges on a Bed of Cement 418
Saving Man Power in Loading Freight Cars 426
Banana Fiber Bags for Raw Sugar Containers. . . . 665
A Safety Lock for Sewing-Machine Treadles 670
The Salt Industry's Profit 673
Cost of Writing Letters 677
Separating Mixed Gas and Oil 677
A Simple Adding Machine 697
Extinguishing Fires in Coal Piles 703
Utilizing Fruit Skins 707
Office Appliances 718
Brick Manufacturers FindThis a Great Labor Saver 750 Handling Hot Firebricks with Asbestos Mittens. . 753
Old Tin Cans Figure in Milady's Costume 825
No Very Great Danger in Making Ejcplosives 832
This Press Makes Two Thousand Bricks a Day. . . 837
Making Use of Tomato Seeds and Skins 839
Ideal Industrial Loconrjotive 851
Office Appliances 852
MECHANICAL ENGINEERING
A Blind French Soldier Invents a Stenographic
Machine 6
The Largest Forging Hammer 65
Work the Brake--Quick 1 Or You'll Hit the Dummy 1 92 A Fowl and Its Feathers Are Soon Parted — With
This Machine 1 96
New Key Hole Saw Which Will Not Jam or Bind 200
A Twentieth Century Treadmill in China 205
��Page
The Brainless Drink-Mixer 205
What High Pressure Means to New York'a Fire
Department 214
Demolishing a Building with a Ball 215
Useful Mechanical Improvements 238-239
Even Milk Bottle Openers Are Problems in
Mechanics 247
Cleaning Five Hundred Blackboard Eraaers at a
Time 249
Punching Holes in Steel Plates 251
Driving Eight Hundred and Fifty Rivets a Minute
in a Trunk 26 1
Cooling Engine Water in Wooden Chimneys 264
How Tools Are Doing Their Bit 265
"Transfer, Please," Is Answered by an Automatic
Machine 267
Shut Yourself Up in Your Can-Bed for the Night 268 Mercury Used for a Thrust Bearing on an Upright
Shaft 291
Steaming Frozen Coal Out of Freight Cars 345
Carrying Off Smoke and Foul Air in the Same
Smokestack 352
Fire-Escape Elevator 355
Mechanical Helps 394
U.S.S. New York Made of Pipes and Fittings 400
Wherein a Head and a Little Ingenuity Save Much
Work 409
New Attachment Gears Up Bicycle 427
Wrapping Taffy by Machine . 317
Mechanical Helps 542
It Eats Nickels and Hlimes and Counts 'Em Too. . 568
A Pair of Socks Every Thirty-five Minutes 685
Heating Tar and Gravel Separately but in One
Operation 697
Mechanical Helps 719
Grading Machine Does Work of 125 Men 731
Paint That Barn by Machine 746
Flexible as India Rubber but Stronger 755
Saws Without Teeth to Cut Through Metal 824
Unloading Freight Cars by Machinery 833
Building a Subway Under a Subway 844
Mechanical Helps 853
Wafting Five Tons About as Though They Were
Thistledown 876
This Moving Van Loads from the Side 876
Holding the Screw to the Screw-Driver 897
Flexible Coupling Takes Side Strain Off Shafting . . 908 Making Water Pump Itself 919
MEDICINE, SURGERY AND HYGIENE
Makes Every Glass a Sanitary Drinking Cup. 4
Why Do You Laugh When You Are Tickled? 31
Curing Soldiers' Hysterical Deafness 68
Dentistry in the Army 77
What Spinal Fluid Tells About Health 97
Bacteriological Laboratory on Wheels 103
Novel Medicine Cover 104
A Chance for the One-Armed Veteran — Let Him
Become a Dentist 167
Horse-Dentistry Is a Pleasing Profession 184
The Illuminated Skeleton Teacher 208
Soothing Our Soldiers Electrically 210
Ears Rust Out More Quickly Than They 'Wear Out 219 There Is an Increasing Wastage of Adult Life. . . . 276 The Diseases for Which Man Blames the Beasts. . 280
The Germs in a Swimming Pool 327
Ventilated Costumes for Use in the Arctic Circle. . 344 Wire Netting Instead of Wood for Surgical Splint. 350
Glasses That You Can Wear in Comfort 351
Mike Has a Nose of Brass, but He Should Worry. 352 Ingenious Light Which Physician May Hold in His
Mouth 353
Bubble Fountain 425
The War Is Causing a Decrease in Lunacy 425
Cultivating Nerve by the Rope Bridge Route. . . . 434
First Camphor Plant ation . . 504
Safety Bottle for Poisons 504
Inflicting Pain to Resuscitate Victims of Electric
Shock 552
We Shall Eat When We Grow Old 552
A Thousand Dentists Will Be in the Army 569
A Side Piece for Eye Glasses which Will Not Break 579
Rejuvenating Soiled Absorbent Cotton 584
Two Boards Studded with Pins Make Bandage
Folder 595
If You Work Hard, Eat More Pancakes 600
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