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PAGE
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Volume 89 — July-December, 1916
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| AERONAUTICS
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PAGE
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| Yachting in the Air
|
22
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| Aeroplane Dreadnoughts
|
75
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| Torpedoing a Submarine from an Aeroplane
|
323
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| The Wastage of Flying Machines in the Great War
|
377
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| War Progress in Flying
|
523
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| Testing the Air-Fighter's Nerve
|
580
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| Testing the Lifting Capacity of Balloon Fabric
|
586
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| Introducing Our First Anti-Aircraft Gun
|
657
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| The One-Man Aeroplane Which a German Boy Is Building
|
695
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| The Sentinels of the Sky Above the War Zone Trenches
|
839
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| Making the Aeroplane Generate Its Own Power for Wireless
|
842
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| Faster Than the Fastest Express Train
|
865
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| AGRICULTURAL SCIENCE
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|
| An Instrument for Plucking Flowers
|
19
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| A Workshop on Every Farm
|
55
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| A Flower Bed on Top of a Rock
|
56
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| A Unique Garden-Hose Holder
|
56
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| Conelike Flower-Holder in a Brick Wall
|
63
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| Filling Trenches by Machine
|
94
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| The Milk-Can Trolley
|
100
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| Chickens Feed Themselves on the Run
|
110
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| Measuring Rainfall on the Farm
|
160
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| Uncle Sam Says Miraculous Wheats Are An Old Delusion
|
166
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| Threshing by Night Under Electric Light
|
166
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| Why the Gasoline Engine Keeps the Farmer Boy at Home
|
175
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| Hitching the Mower to the Farm Automobile
|
182
|
| Accelerating the Fruit-Picker with a Picking Harness
|
185
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| A New Garden Duster Which Uses Dry Spray
|
195
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| Plants on National Forest Ranges Which Kill Cattle
|
252
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| A Giant Cypress Tree Village in Paris
|
267
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| A Painless Way of Killing Chickens
|
294
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| A Simple Home-Made Milking Stool
|
299
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| Chick Mash Box
|
301
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| Improving the Hog's Table Manners
|
306
|
| Uses for Wire-Glass on the Farm
|
308
|
| Raising Parasites to Fight Pests
|
368
|
| The Floating Vegetable Gardens of Mexico
|
384
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| A Garden Tractor which Does Everything but Mind the Baby
|
410
|
| Rolling, Harrowing and Seeding with One Machine.
|
417
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| A Weed Destroyer from a Spoon and Broom-Handle
|
468
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| A Portable Colony Poultry House
|
476
|
| A Cozy Southern Farmhouse
|
479
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| An Easily Made Self-Locking Device for Barn-Doors
|
614
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| A Combined Farm Implement Shed and Machine-Shop
|
640
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| The Largest Duck Farm in the World
|
662-663
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| The Handiest Bam Ever Built
|
675
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| A Humane Method of Destroying Horses
|
684
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| Cleaning and Sorting Beans by Machinery
|
686
|
| Teaching English Girls the Art of Milking
|
738
|
| Branding Animals with a Clamp-Button Monogram
|
747
|
| An Alarm-Clock Dinner Bell for Old Dobbin
|
779
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| An Automatic Grain-Valve to Prevent Waste
|
780
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| Tropical "Snow Drifts" of Cheesecloth
|
819
|
| An Adjustable Steering Device for the Tractor
|
832
|
| Sheep May Not Like This But It Saves Time
|
855
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| Separating the Rooster from His Crow
|
868
|
| Warning Herdsmen of Storms
|
893
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| Are You Paying for Your Farm or Is It Paying for Itself
|
893
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| Indoor Tomato Plants Fifteen Feet High
|
895
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| Valuable Products from Cherry Pits
|
895
|
| An Anchored Hen House
|
912
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| Plans of a Small Modern Dairy Barn
|
960
|
| ASTRONOMY
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|
| Curious Set of Features Are New Markings on Mars
|
225
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| Lost Comets
|
504
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| Is Jupiter Launching a Moon?
|
678
|
| Studying the Stars with Mirrors
|
908
|
| AUTOMOBILES AND ACCESSORIES
|
|
| Automobile Scale-Demonstrator
|
6
|
| A Duck-Boat as an Automobile Top
|
14
|
| Portable Electric Tire-Inflator
|
26
|
| Keeping Things Cold in a Real Automobile Refrigerator
|
27
|
| A Record Motor-Truck Load of Barrels
|
27
|
| How One Ford Got Up in the World
|
28
|
| How Automobiles Innocently Break Windows
|
31
|
| How an Automobile Engine Tests Water-Mains
|
48
|
| What Make of Car Is It?
|
72
|
| The Possibilities of the Ford Chassis
|
84-85
|
| Semaphore Signals for Automobiles
|
114
|
| Using Gates to Lessen Danger from Truck-Trailers
|
116
|
| Lapping a Scored Automobile Engine Cylinder
|
124
|
| A Handy Hook for the Automobilist
|
125
|
| Trend of Motor-Truck Design Toward Worm Drive
|
159
|
| An Air-Propelled Automobile for Three Dollars
|
173
|
| The Reinforced Concrete Principle Applied to Automobile Tires
|
182
|
| Automobiles. Motor Trucks and Accessories
|
186-189
|
| Moving Guns with an Electric Battery Crane-Truck
|
231
|
| Automatic Flagmen to Warn Motor-Car Drivers
|
242
|
| A Gasoline-Electric Automobile
|
253
|
| Lubricating Your Automobile
|
262
|
| Starting Your Automobile with Ether
|
307
|
| This Automobile Seat Serves as a Waiting Room
|
332
|
| Economizing Gasoline for Automobiles
|
355
|
| A Shim for Adjusting Plain Bearings
|
355
|
| Automobiles, Motor-Trucks and Accessories
|
356-357
|
| Fifteen Motor-Trucks in One
|
358
|
| When the Horse Tops It Over the Automobile
|
360
|
| Railroad Treads for Motor-Trucks
|
391
|
| Motor-Trucks to the Rescue in a Freight Embargo
|
412
|
| An Electric Motor-Chair
|
412
|
| A Six-Wheel Automobile
|
430
|
| Wiring the Ford for Magneto and Battery
|
442
|
| Pumping Gasoline to the Motor
|
508
|
| The Motorcycle Machine-Gun
|
529
|
| Automobiles, Motor-Trucks and Accessories
|
540-543
|
| "Troubleshooting" at Night
|
544
|
| A Motor-Truck That Equals Two
|
545
|
| The Wiles of the Automobile Thief
|
560
|
| A New Gasoline-Motor-Driven Road Roller
|
561
|
| Motoring on Roller-Skates
|
569
|
| A Six-Mile Trip Through a Sewer on a Motor-Cycle
|
574
|
| The Sidewalk Coaster Becomes an Automobile
|
592
|
| Making Automobile Wheels Track Correctly
|
593
|
| Quickly Adjustable Automobile Fan-Belt Fasteners
|
604
|
| Loading Small Luggage on the Outside of the Car
|
605
|
| How Piston-Ring Defects Have Been Overcome
|
605
|
| Lightening Automobiles with Aluminum
|
606
|
| Operating the Oil-Pump of an Automobile by Valve Action
|
615
|
| A Watch-Carrier for the Motorcycle Handlebar
|
615
|
| Easily Attached Shock-Absorber
|
618
|
| How to Avoid Excessive Oiling in Cylinders
|
620
|
| Spark-plugs Tested Without Removal
|
621
|
| A Washstand Light for Garages
|
645
|
| Charging Weak Magnetos of Weak Automobiles
|
672
|
| A New Brake Which Makes Trucks Safe
|
685
|
| Rubber-Ball Fender to Protect Unwary Pedestrians
|
685
|
| Recording the Vibrations of a Motor-Truck Spring
|
688
|
| When You Leave the Automobile, Lock the Robes!
|
699
|
| Automobiles, Motor-Trucks and Accessories
|
700-703
|
| The Automobile Street Car
|
724
|
| Breaking a Mountain Trail
|
740
|
| A Motor-Wheel for the Railroad Velocipede
|
742
|
| Automatic Word Signals for Automobiles
|
746
|
| Timing an Automobile Race
|
753
|
| Backing an Automobile into a Moving Garage
|
755
|
| Constructing a Sidecar for a Bicycle or Motorcycle
|
765
|
| Fillers for the Pedal Slots of Automobiles
|
783
|
| Lubricating Automobile Spring Shackles and Bolts
|
783
|
| Estimating the Speed of Passing Automobiles
|
784
|
| Making a Sediment Pocket in Feed Line to Carburetor
|
784
|
| Caring for Storage Batteries on Automobiles
|
792
|
| Novel Method of Drive for Light Cycle-Cars
|
806
|
| Timing Automobile Speed Demons
|
806
|
| A Wonderful New Glass Which Cannot Be Shattered
|
811
|
| An Automatic Safety Fender Sets the Brakes
|
836
|
| A Floating Road for Automobiles
|
864
|
| The Intelligent Motor Milk-Wagon
|
869
|
| Twelve Cylinders or Six in One Car
|
872
|
| Plowing Snow with Your Automobile
|
882
|
| Automobiles, Motor-Trucks and Accessories 888 —
|
891
|
| An Automobile Pump Drive from the Rear Wheel
|
895
|
| The Tiniest Motorcycle to Be Used in the Army
|
896
|
| Preaching the Gospel from an Automobile
|
906
|
| Tank Trucks as Tenders to Submarines
|
906
|
| Testing the Strength of an Ostrich
|
907
|
| A British Motor-Bus Run on Coal Gas
|
912
|
| A Motor-Driven Brake
|
914
|
| Wire Wheels for Automobiles
|
915
|
| Combination Lamp and Horn for the Motorcycle
|
920
|
| Automobile Carbureter for Heavy Fuel Oils
|
936
|
| BOATING
|
|
| Your Mainsail and the Wind
|
49
|
| Forty Miles an Hour on the Water
|
83
|
| How to Run a Motor-Boat
|
112
|
| CHEMISTRY
|
|
| Asphyxiating a Fire with Sulphur
|
884
|
| Producing the Coldest Cold
|
916
|
| A Quickly Made Silver-Platng Powder
|
937
|
| How to Handle Sulphuric Acid with Safety
|
945
|
| CIVIL ENGINEERING
|
|
| The Destruction of the Exposition City
|
8-11
|
| A Ticklish Moment
|
29
|
| "Ironing Out" Earthquake Wrinkles in San Francisco
|
31
|
| An Inverted Steam Hammer for Drawing Piles
|
53
|
| Saving Hours in Handling New York Subway Dirt
|
54
|
| An Excavator Which Walks
|
61
|
| Electrifying the Clam-Shell Bucket
|
87
|
| Making Water Pump Itself
|
98
|
| A Damaged Lock Gate Repaired by Its Own Water
|
234
|
| Lowering a Bridge Without Blocking the Traffic
|
240
|
| Uncle Sam's New Dam at Elephant Butte
|
259
|
| A Substantial Cableway Built from Scrap Material
|
327
|
| The Senators' Subway
|
328
|
| Bagging Rivet Heads with a Butterfly Net
|
333
|
| Blowing Concrete into Place
|
411
|
| Safeguarding the Sand Blaster
|
418
|
| Building a Bank Around a Bank
|
485
|
| Holding the Hudson at Bay
|
537
|
| Road Construction Facts by the Wayside
|
544
|
| Solving New York's Freight Problem
|
546
|
| Ten Millions to Save Four Miles
|
553
|
| Transforming a Beauty Spot into a Public Utility
|
574
|
| A Bridge Five and One Half Miles Long
|
583
|
| Strenuous Search for Durable Roads in a St. Louis Park
|
672
|
| Giant Slabs of Marble to Commemorate Abraham Lincoln
|
689
|
| Meerschaum as a Building Material in Spain
|
689
|
| Boring Straight by Photography
|
720
|
| Quebec's Disastrous Bridge
|
728
|
| Cleaning Sewers from the Street
|
838
|
| The Old-Fashioned Heavy Paving-Block Gives Place to a New Form
|
844
|
| Taking the Temperature of a Dam
|
866
|
| ELECTRICITY
|
|
| Welding Soft Metal to Hard
|
17
|
| The Voice Typewriter
|
65
|
| An Exciter for Electroscopes
|
135
|
| Interference of Lighting Circuit by Static Electricity
|
135
|
| Rejuvenating Electric Lamps
|
135
|
| A Wet Battery from a Dry One
|
135
|
| Electric Striking Mechanism for Mission Clocks
|
137
|
| An Electrically Operated Device for Lighting Gas
|
141
|
| How to Make an Attachment-Plug
|
142
|
| A Model Electrical Hammer
|
142
|
| How to Make an Electric Shaving-Mug
|
143
|
| Testing Electric Lamps Quickly
|
144
|
| Using Cartridge Shells for Electrical Contacts
|
144
|
| A Hoop with a Guiding Hub
|
152
|
| Perfuming and Cooling the Air with An Electric Fan
|
175
|
| The King of New York s Lighting Spectacles
|
177
|
| A Tool for Buffing, Drilling and Grinding Metal Surfaces
|
192
|
| Toying with High Tension Currents
|
248
|
| A Home-Made Edison Battery
|
276
|
| A Clever Window Display
|
277
|
| Five Examples of Alarm Work
|
279
|
| Rectifying Alternating Current
|
283
|
| Making an Electric Fire Alarm
|
284
|
| Cutting Glass-Tubing by Electricity
|
311
|
| A One-Eyed Mechanical Stenograptier
|
335
|
| Why You Could Not Get Your Man on the Wire
|
371
|
| An Electric Motor-Chair
|
412
|
| A Convenient Arrangement for Turning on the Hall Light
|
442
|
| Wiring the Ford for Magneto and Battery
|
442
|
| A Simple Way to Construct a Ten-Ampere Shunt
|
443
|
| Controlling Temperature and Humidity at the Same Time
|
444
|
| Electric Substitute for the Latch-key
|
444
|
| Making an Induction Coil
|
446
|
| Magnet Winder
|
446
|
| Dry Cells and Their Voltage
|
446
|
| Utilizing Broken Marble Pieces
|
446
|
| How to Rid Your Yard of Cats
|
447
|
| To Stop the Milk Thief
|
447
|
| A Simple Primary Coil
|
452
|
| A Heat-Resisting Socket for High Wattage Lamps
|
511
|
| Pocket-Flashlight Distress-Signals
|
520
|
| A Hand-Magnet That Lifts Fifteen Times Its Own Weight
|
536
|
| The Czar of the Power-House
|
555
|
| A New Electric Cloth-Cutter for Small Shops
|
564
|
| The Electrical Scrub-Woman — Brainless but Efficient
|
566
|
| Small Electric Pump for Draining Seepage from a Cellar
|
567
|
| A Voting Machine for Congress
|
582
|
| Flood Lighting Niagara
|
584
|
| The Nic:ht Eyes of the Coast Artillery
|
586
|
| A Warning to Fishermen
|
590
|
| A Photographic Printing-Box for Use with Electric Current
|
601
|
| A Simple Tracing Method for Electrical Draftsmen
|
606
|
| Tapping Field Telephone Wires
|
622
|
| Tracing Initials on Tools with Electricity
|
632
|
| Saving the Picture Show with a New Rheostat
|
633
|
| A Combination Front and Back Door Alarm-Bell
|
634
|
| Electric Burner for Making Storage-Battery Connections
|
634
|
| To Change a Gas Lamp into an Electric Light
|
635
|
| Lighting an Oil-Stove with an Alarm-Clock
|
635
|
| A Simple Electrical Device for Purifying Water
|
638
|
| Lifting Street Cars with a Powerful Electric Hoist
|
673
|
| Electric Hand Lantern Costs Less than a Kerosene Burner -
|
681
|
| Electric Ranges Are Becoming Popular
|
681
|
| Electrolytic Extraction of Gold from Black Sand
|
680
|
| Look Out Perhaps the Man You're Talking to Wears a Detectaphone
|
687
|
| Protecting the Telephone Operator
|
706
|
| Telegraphing Through the Ocean
|
711
|
| Toys That Obey Your Voice
|
718
|
| Miniature Magnet-Propelled Ships
|
757
|
| Hearing Your Voice Through Your Bones
|
142
|
| Manhole Ventilated with Electric Fan
|
748
|
| Reducing the Furnace Man to a Mere Push-Button
|
751
|
| A Magic Wand Which Changes Cold Water into Hot Almost Instantly
|
752
|
| The Electric Thief-Catcher
|
756
|
| How Electricity and Temperature Affect a Watch
|
761
|
| A Hallowe'en Chamber of Horrors
|
777
|
| An Improvised Coil Winder for Electrical Apparatus
|
787
|
| A Home-Made Fuse for a Small Battery Current
|
793
|
| Amateur Trench FJcctricians
|
794
|
| A Danger Signal Used to Direct Attention Overhead Perils
|
829
|
| An Extension Reel for Electric Lamps
|
843
|
| An Electrically Heated Foot-Board for the Policeman
|
683
|
| Determining the Intensity of Illumination by a New Measuring System
|
913
|
| Making an Electrically Heated Soldering Iron
|
947
|
| An Electric Burglar Alarm Attached toa Door-Lock
|
947
|
| A Dead End Switch of the Multiple-Point Type
|
948
|
| A Salt Water Polarity Indicator Made from a Burned Out Fuse
|
952
|
| An Electrically-Operated Recording Weather Vane
|
952
|
| Operating Furnace Checks and Drafts by Electricity
|
954
|
| HOUSEKEEPING MADE EASY
|
|
| An Improved Vegetable Slicer
|
107
|
| Housekeeping Made Easy
|
111
|
| Why Young Girls Don't Leave Home
|
232
|
| Keeping Food Without Ice
|
293
|
| Make Your Own Lazy-Betty
|
299
|
| Improving a Towel-Roller
|
301
|
| String Holder and Cutter
|
306
|
| Handy Folding Kitchen Tables
|
309
|
| Housekeeping Made Easy
|
372
|
| Cleaning Gloves Economically with Benzine
|
409
|
| Converting Sun-Parlor into Bedroom
|
427
|
| A Towel Holder
|
458
|
| A Convenient Shoe-Rack
|
459
|
| An Easily Constructed Holder for the Broom
|
468
|
| A Screen Door-check
|
477
|
| How Do You Sit?
|
551
|
| Bathing in Your Trunk
|
557
|
| Housekeeping Made Easy
|
558
|
| Using the Steam Radiator to Remove Wall-Paper
|
564
|
| The Electric Scrub-Woman — Brainless but Efficient
|
566
|
| Trundling Your Washing-Machine on Wheels
|
566
|
| Why Isn't This Used Instead of Hooks and Eyes?
|
575
|
| Repairing Worn Wheels of a Carpet-Sweeper
|
601
|
| A Scheme for Keeping Pictures Hanging Straight
|
608
|
| A Clothes-Rack foi Use Indoors and Outdoors
|
603
|
| Protecting the Gas Range with a Wind-Shield
|
618
|
| Turning tfie Stationary Tub into an Electric Washing Machine
|
647
|
| Electric Ranges Are Becoming Popular
|
681
|
| Housekeeping Made Easy
|
690
|
| Water-Heating Garbage Burner
|
698
|
| Doing the Family Washing in Your Rocking Chair
|
738
|
| The "Permanent Wave" of a Woman's Hair and Its Secret
|
743
|
| Reducing the Furnace Man to a Mere Push-Button
|
731
|
| A Comfortable Electric Foot-Warmer Pad
|
752
|
| A Foot-Warmer Attachment for a Radiator
|
761
|
| How to Straighten the Crooked Straws of a Broom
|
775
|
| A Heater for Use Over the Flame of a Gas Jet or Kerosene Lamp
|
855
|
| Housekeeping Made Easy
|
858
|
| Removing Old Starch from Clothes by a Malt Extract Bath
|
913
|
| HOW THE WAR IS BEING FOUGHT
|
|
| War Pictures
|
32
|
| When the Fighting Man Dreams
|
53
|
| Locating Guns by Delicate Earthquake-Detectors
|
178
|
| Submarine Destroyers
|
180
|
| War Pictures
|
208
|
| Experimenting with Liquid Fire
|
208
|
| Firing with Heavy Artillery at an Enemy You Can't See
|
226
|
| War Pictures
|
336
|
| The Wastage of Flying Machines in the Great War
|
377
|
| "Shooting" a Photograph with a Pistol-Camera
|
408
|
| A Modern War Relic
|
425
|
| Fitting Penholders to Crippled Hands
|
435
|
| War Pictures
|
487
|
| How London Cares for Soldiers' Babies
|
502
|
| How the Firing of Heavy Guns Affects Animals
|
576
|
| Detecting Enemy Submarines from a Ship's Look-Out
|
579
|
| INVENTIONS TO MAKE LIFE EASY
|
|
| Adjustable Kettle-Cover
|
113
|
| Hammer for Onc-Armed Man
|
113
|
| Handling the Cord of Electric Irons
|
113
|
| At Last! A Lock for Slipping Rubbers
|
113
|
| A New Way of Directing the Breeze of a Fan
|
113
|
| A Suit-Shaker Which Will Not Clog
|
113
|
| An Adjustable Golf-Tee Board
|
114
|
| Combined Penholder and Blotter
|
114
|
| Saw Cuts Square Hole
|
114
|
| Semaphore Signals for Automobiles
|
114
|
| Skinning the Slippery Eel
|
114
|
| Why Fall Down in Your Bath-Tub?
|
114
|
| At Last! A Machine Which Irons Skirts Without a Murmur
|
184
|
| Keeping Cool with a Fan Driven by a Hot-Air Engine
|
246
|
| A Fancy Shoe-Lace Cover
|
270
|
| A Heater for the Parlor Lamp
|
270
|
| Pipe Loaded from Stem
|
270
|
| Automatic Roller Bearing
|
270
|
| A Spoon That Can't Slip
|
270
|
| Spout Attachment for Bottles
|
270
|
| Aluminum Billiard Cue
|
271
|
| Automobiling with a Bicycle
|
271
|
| Beating the Dentist to It
|
271
|
| A Cure for Butter Fingers
|
271
|
| Facilitating Speed in Writing
|
271
|
| A Swatter for High-Fliers
|
271
|
| Shoes of Esparto Straw which Outwear Leather
|
375
|
| Escaping the Barber's Fingers
|
432
|
| Collapsible Tooth-Brush Case
|
432
|
| Keeping the Baby's Bottle Just Right
|
432
|
| A Pipe with a Cleaning Wick
|
432
|
| A Detachable Massage Brush
|
432
|
| A Mechanical Oyster-Opener
|
432
|
| Holding Asparagus in the Can
|
433
|
| Adding Dignity to Condensed Milk Cans
|
433
|
| Putting Ejchaust Gases to Work
|
433
|
| Reducing Eye-Strain
|
433
|
| Handle and Cover for Milk Bottles
|
433
|
| MECHANICAL ENGINEERING
|
|
| Revolving Portable Elevator
|
165
|
| Coaling a Liner with An Elevator
|
206
|
| A Giant Grinder Which Goes to Its Work
|
240
|
| How Heat Is Measured with the Eye
|
330
|
| New Kind of Lawn Sprinkler
|
332
|
| Loading Guns by Pneumatic Tube
|
334
|
| The Paving Blocks of Paris
|
352
|
| Sorting and Packing Apples by Machinery
|
363
|
| A Low Water Alarm for Boilers
|
370
|
| Locomotive Runs Three Hours on Charge from Boiler Plant
|
370
|
| A Typewriter Made Especially for the One-Armed
|
371
|
| A Locomotive that Burns Pulverized Coal
|
376
|
| Keeping Watch on the Chimney
|
378
|
| The "Spinning Whejpl" Gun
|
397
|
| One of the Pranks of the San Francisco Earthquake
|
416
|
| Why Not Make Rain Work? A Chance for a Rain Motor
|
419
|
| Smoothing Sidewalks by Machine
|
426
|
| The Preeminence of American Inventive Ingenuity
|
427
|
| Belt Shifter Protects Workmen
|
434
|
| A Curious Clock Built on a New Principle
|
511
|
| Putting Wheels Under Workmen
|
514
|
| Harnessing the Sun
|
513
|
| A Machine-Shop in a Diving-Bell
|
577
|
| Preventing Ships from Rolling with Fly Wheels
|
591
|
| Cleaning Crown Bottle-Corks in a Portable Hopper
|
592
|
| A High-Speed Bit That Bores Without Choking
|
647
|
| Let a Puff of Air Do It
|
664
|
| Air Is Stronger Than Arms
|
665
|
| Dummies That Dance and Play
|
666
|
| Dual Power. Portable Hoisting Machine of Compact Design
|
674
|
| A Modern "Newspaper Maker"
|
676
|
| A Simple Instrument Which Measures the Height of a Tree
|
696
|
| To Protect the Fingers of the Woodworker
|
705
|
| Combined Velocipede and Hobby-Horse
|
715
|
| Felling Trees Automatically with a Mechanical Swordfish
|
715
|
| A Water Curtain Used on a Heating Furnace
|
726
|
| The Inventor of the Steam Engine Was Interested in Gim-Cracks
|
739
|
| Saving Gold and Silver on the Vacuum-Cleaner Principles
|
750
|
| This Ice-Cutting Machine Takes the Place of Eight Horse-Teams
|
810
|
| Preventing Boiler Troubles by Mechanical Cleaning
|
811
|
| An Adjustable Steering Device for the Tractor
|
832
|
| A Mechanical Printer for Facsimile Letters
|
836
|
