INDEX TO VOLUME 92
��r>*ATURAL SCIENCE Page
A Horn of Natural Rock 27
Unaccommodating Wells 29
No Steam Heat for This House. It Would Melt . 34 What Make* the Tumbler Pigeon Tumble in Flight? 43
The Mole Is a Gormandizer 49
A Cauliflower of Ice 73
A Poisoned Sea 73
Glaze: An Old Winter Foe with a New Name ... 81 The Slacker Hen — She Lays Curious but Uneatable
Eggs 118
Why Monkeys Use Their Fists 166
Nature in the Role of Wood Designer 179
How Floating Particles of Dust Cause a Fire 185
A Whale Which Strains Its Food Through Whiskers 188
Nature Herself Branded These Cattle 193
A Well That Supplies Two Kinds of Water 201
Why the Horse Is an Aristocrat 273
What Was the Type of Dog That Went Into Noah's
Ark? 347
Forest Skyscrapers 347
Deep-Sea Fish with Lanterns 366
Magnetized Birds? Another Explanation of Ac- curate Migratory Flight 368
The Wise Potato. It Refused to Produce Un- necessary Seeds 426
Yawning Fishes 440
1 ntroducins; the Moropus 507
The Tick Was the First Insect Disease-Carrier to
Get Caught 517
If You Don't Smell AH Right in a Bee-Hive.
You're Kicked Out 537
Forest Skyscrapers 555
Why Tanks are Giant Caterpillars 556
"Educated " Ants the Latest in Animal Training. 580 Supplying Water to the Thirsty Rootlets of
Potted Plants 581
Good and Bad Mushrooms Hard to Distinguish. . 586
Trees Stunted by the Wind 664
Even a Parasite May Prove to Be Useful to Man 67 I
Have You Ever Found a Thing Like That 672
Why Isn't It Hotter Nearer the Sun? 700
Insects Which Eat Tobacco 707
WhenlsaFeather Not a Feather? When I t's a Hair 726 How a Woman Makes Money by Putting Nature
Under Glass 838
Nature Carves a Queer Snow-Cave in the Cali- fornia Sierras 865
An Alibi for the Bee in the Orchard 870
Something to Lose Sleep Over — Can Fish Hear? . . 886
The Queer Forms of Some Flies 886
The Secret of the Wily Snake's Sinuous Glide 892
PHOTOGRAPHY AND MOTION PICTURES
Doll* Become Screen Idols 36
With Thi* Darkroom Develop Your Photographs
on the Spot 43
Photographing Your Measure 70
Enlist Your Camera Lens 72
A Masking Device Which Brings the Whole Picture
in the Photograph 106
How a ^Photograph Can Tell the Efficiency of a
Pumping Machine 120
A Portable Cabinet for the Photographer 124
Races in the Motion Pictures 165
Forcing an Auto into the Air with a Stream of
Water 193
How the Cavalcade Approaches Behind the Scenes 200 Home Portraiture for Snakes — Try It on a Rattler 201 How Many Tree-Top "Close-Ups" Are Taken . . 224
Mixing Colors on the Screen 226
Motion Pictures Fool the Law of Gravity 254
A Homemade Focusinff Hood for a Hand Camera. 282
A New Use for Fogged Photographic Plates 316
Introducing the Inflatable Speecn-Sausage 326
Screen Thrill* Are Cheaper Now 348
Motion-Picture* Twice the Regular Size 390
Motion Radiography 554
A Motorcycle a* a Vibrationle** Tripod 555
The Motion-Picture Scene-Shifter Enter* the War 588 Seen from Above. Thi* Picture . Would Look
Different 594
The Bottle Break*, but Not the Head of the Villain 682 l.njoy Your Snap*h'>t* Better by Enlarging Them 684
I'holographing a Historical Parade 702
Real Light* for the Auto* in Motion Picture* .... 742 Remarkable Photograph uf an Actual Battle Scene 747
��Page Protecting Aviator's Camera Bellows from Wind 750 A Reflex Attachment for Use on a Hand Camera 766 A Derby Hat Used in Place of Camera Tripod .... 868
No Double Elxposures with 1 his Device 893
Photographing Holland in California 912
Holding Photographic Plates from Tray Bottom . . 942 Making Photographic Timer Out of Watch 945
PHYSICS
What Causes the Singing of Telegraph Wire*? ... 33
Making Millions Out of Bubbles 82
Clearing Out Sewer Pipes with Compressed Air. . . 102
To Remove Liquid Don't Lift It 119
PICTURE PAGES
Preparing the Powder Sacks for 16-lnch Guns 8-9
Tobacco Growing lO-I I
The World's Most Cherished Medals 12-13
Making Candles 14-15
Taking Motion Pictures in the Canadian Rockies . 16-17
Making Over the Physically Unfit 18-19
Making Dolls 20-2 1
What Happens to the Food We Eat? 22
Is Your Brain Completely Furnished? 23
Making Rope 168-169
Growing Gourds in New Jersey 1 70
English Jackies Go to School 171
If You Haven't Chosen Your Vocation, Here Are a
Few Suggestions for You I 72-1 73
Reading Flag Signals from the Sky 174
How Her Jewelled Comb Is Made 175
Sound Bombs Soar into Air to Warn London of Air
Raids 176-177
England's Heroines Are in Her Munition Plants. . . 178
Nature in the Role of Wood Designer I 79
Cliff Dwellers 180-181
Making Isinglass 182-183
Various Types of German Bombs 328—329
Packing Sardines 330
Armless but Not Helpless 33 1
Mountaineering in the Alps 332
Made in Winter's Open Air Studio 334
Quaint Sampans of the Far East 335
Exercisers for Wounded Soldiers 336-337
Sir William Tritton, Inventor of the "Tank " 338
Training Radio Men at Our Aviation Schools 339
The Right Way to Vulcanize a Tire 340-341
Where a Ford Has Never Traveled 488-489
Raising Money for the Red Cross 490-491
Women Conductors for Street Railways 492
Some Aspect -of the Work of Our Signal Corps . 493
Interesting Examples of Camouflage 494-495
Making Cigarettes 496-497
New York's Food Scouts 498
New York Coroner's Office 499
The Girl Brickmakers of England 500-501
Gathering Oysters in Winter 502
Shelter Bridges Near Dixmude 503
Airplane Caught in Wireless Mast 648
Launching Hydroairplanes from Battleships 649
An Armory Converted Into Military Hospital 650-651
Sacred Animals of the East 652
The Lack of Coal and Food in Paris 633
A New Military Litter 654-635
The Hog Island Shipyards 656-657
Ancient Chinese Apartment Houses 638
A Crypt Decorated with Human Bones 639
The Doves of War 660 66 I
Mechanical Appliances Used in Surgery 662-663
Teaching Our Soldiers the Hand - to - Hand
Struggle 808-809
Woodenware and Hardware Hat* 810-81 1
Sterilizing Wagons for the Army . . . : 812
The Army's Portable Laundry 813
Patriotic Emblems 814-81 3
Five Million Pleasure C»r». • Total of 120 Million
Horse-Power 816-817
Making Artificial Limbs for Soldier* 818-819
Making Game Birds Pay 820-821
Airplane Picture of German Line* 822-823
PRACTICAL WORKERS' DEPARTMENT
An Attachment for an Auto to Make a Wrecke* . 121 A Guard or Ink Shield for a Penholder 122
A Liquid to Clean Silverware Without Damage. . . 122
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