INDEX TO VOLUME 88
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An Oil Trav Made VC'ithout Solder 294
To Face Left-Hand Nuts 439
A Spirit-Level for Use in Dark Places 439
The Flap-lock Envelope 440
Home-Made Motion Picture Camera 440
An Electrically-Operated Screwdriver 441
How to Make a Self-Honing Razor Strop 441
A Simple Air Pump 442
Barrel for Holding Sacks 443
Gage for Duplicate Hole Drilling 443
Sawing Difficult Angles on Small Stock 443
An Emergency Pipe-Cutter 444
Handling Small Brads 444
A Lathe Polishing Kink 444
A Simple Bit-Gage 444
Tapping Blind Holes 444
Using Ice in Masonry 444
Whistle on Engine of Motor Boat 444
How to Build an Aero Ice-Racer 445
An Emergency Drill Press 449
A Handy Chuck for a Small Lathe 449
A Simple Gas-Pressure Regulator 449
To Adjust a Light-Cord 450
The Thermos Bottle as a Stove 450
Utilizing Empty Cartridges 450
Cutting Brass *462
An Oil-Proof Cement 508
Sandpapering Made Easy 568
A Method of Packing Barrels 568
Deep Center-Punching 586
A Useful Gage for Motorists 597
How Betsy Ross Made a Five-Pointed Star With
One Cut 597
Making and Using a Small Drill 598
Straightening Kinlced Wire 598
How to Construct a Simple Cyclecar Starter. . . . 399
Removing Tires with a Clothes-Pin 599
Bunsen Burner and Blow-Torch Combined 600
Brass Tube Cleans File Teeth 600
Cutting Glass Bottles and Tubes with Oil 600
A Coarse File for Soft Metals 600
A Trousers-Hanger 600
A Piece of Furniture of Many Uses 601
Washing Blueprints and Bromide Enlargements. . 601
Save Fuel for Oil-Burners 602
A Speedometer Light for Ford Cars 602
Driving Piles into Quicksand 602
Making a Kite-Camera 603
Turning Out Large Sheave Wheels Without a Lathe 604
A Two-Jaw Chuck 605
How to Wind Springs Easily 605
Using an Electric Iron as a Stove 606
How to Make a Leveling-Board 606
A Handy Drawer-Catch 606
A Paint Brush Hook 606
To Bore Endwise in Wood 606
Filtering Mercury 607
A Simple Bit Gage 607
Blacking Box Inside Brush 607
Razor Blade Floor-Scraper 607
A Novel Polishing Pad 607
A Handy Drawing Table 608
Acid Engraving on Steel in Your Own Hand- writing 608
Lighting Your Pipe in the Wind 608
Attaching an Index Plate 609
A Candle Motor 609
An Emergency Vise Repair 609
A Trick in Sawing 609
An Electric Alarm Operated by a Clock 610
Protecting Labels on Bottles 610
Workbench Made from Old Piano 610
A Library Paste Which Does Not Dry Up 610
Handling Small Bolts Easily 610
Catching Rats Wholesale 611
A News Stand and Blueprint Washer Combined 611
Laying Out Angles with a Two-Foot Rule 612
A Simple Way of Making Facsimile Rubber
Stamps 612
Making a Bench Shear 753
A Drill Made from a Needle 753
Making a Handy Power-Bench 760
Construction of a Revolving Drawing-Board 761
The Construction and Use of a Safe Driving-Box
Lifter 761
Making Dies of Difficult Outline 762
A Set of Jaws for Counter-Boring and Facing . . . 762
Uncouoling Pipes 764
Rounding Washers in a Speed Lathe 768
Making Shrinkers 769
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An Easy Way to Punch Holes in Clock-Spring Steel 770
An Improvised Pipe- Wrench 770
Improving a Drawing-Ink Bottle 770
A Bow-Drill for the Work Shop 771
Non-Upsetting Holder for Drawing Inks 772
Inside Counter-Boring in a Miller 773
How to Improve a Pocket Spectroscope 773
A Lathe Polishing Kink 774
Tapping Blind Holes 774
How to Cut Metal and Not Cut Yourself 774
Handling Small Brads 774
Whistle on Engine of Motor-Boat 774
An Emergency Pipe-Cutter 774
An Automatic Pressure-Gage Alarm 780
How to Make an Electric Horn 788
Soldering German Silver 792
Non-Irritating Skin Cleanser 794
Detachable Blades for Hatchets 813
Measuring Cloth in the Roll 827
Paraffin Protects the Labels of Chemical Bottles. . 878
Adjustable Light-Holders for Factory Illumination 880
Oiling the Vs on a Lathe 880
Slow-Setting Plaster of Paris 887
A Long-Handled Screwdriver 910
Driving Screws in Inaccessible Places 918
A Home-Made Ice-Mold 918
How to Etch a Water-Set 918
Making an Electric Lantern from a Flashlight ... 918
Drilling Holes in Sheet Metal 919
Grinding Out Dies 919
A Home-Made Scalpel for Trappers 919
How to Make a Reamer 919
A Hose Connection Guaranteed Water-Tight .... 920
How to Mend a Broken Casting 920
Silver-Plating Glass 920
How to Protect the Surface of a Laboratory Table 924
A Mission Stain 924
A Cheap Beam-Compass 925
Gaging the Stack Draft 925
A Safe Way of Bending Pipes 925
How to Make a Polariscope to be Used as a Micro- scope 926
To Stop a Lathe Quickly 926
Cutting Tile at Any Angle 927
A Substitute for a Soldering Iron 927
Taking the Squeak Out of a Sign 927
Handling Fine Screws 928
A Home-Made Thumb-Screw 928
How to Make a Barometer 928
Making a Long Distance Shot with a Shotgun . . . 928
Oiling Hammer Handle 928
RADIO COMMUNICATION
Impedance of Oscillation Circuits in Wireless
Telegraphy 1 43
Recent Radio Inventions 146
A Multiple Point Switch 149
Radio Stations in Alaska I 50
Radio Club News 1 54
What Radio Readers Want to Know 155
A New Aerial Supporter 157
A Simple Changt-Over Switch 157
A Condenser's Power 157
Aeroplanes, Wireless and the War 295
Duplex Wireless Telegraphy 297
Recent Radio Inventions 298
Crystal Detec'tor Hints 301
Antenna Circuits in Radio Telegraphy 302
Edison's Railroad Wireless 305
A Roof Insulator 305
International Conference at Washington 305
Radio Has Velocity of Light 305
The Static Coupled Receiving Tuner 306
A Mexican Radio Station 307
Radio Club News 308
A Variable Condenser 308
What Radio Readers Want to Know 309
Safeguarding Vessels by Radio 451
The Earth's Conductivity 433
The Obligation to Secrecy 454
Photographic Records Still Impracticable 454
The Wireless Idea Is More Than Seventy Years Old 455
Recent Radio Inventions 456
An Improved Crystal Detector Stand 460
Loose-Coupler Switch Arrangement 460
A Motor-Operated Aerial Switch 463
Free and Forced Oscillations in Radio Telegraphy 464
Making a Simple Alternating Current Rectifier. . . 468
Radio's First Rescue 468
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