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If it be assumed that the base of the triangle represents a line 1,000 feet long and that the first sloping line represents a road having a rise that brings it 50 feet above the starting point, this is figured as 50 feet in a thousand, or 5 per cent. In other words, one foot of rise for every 20 feet, but the latter instance does not mean distance actually traveled by a car in ascending such a slope, but distance measured horizontally with reference to that slope. The grade is measured by the tangent of the angle of inclination and not by its sine, so that a grade which represents 100 per cent. cortesponds to an angle of inclination of but 45 degrees, and not go degrees, or perpendicular, as is commonly supposed. At the upper end of the next sloping line the elevation would amount to 661 feet, which is equivalent to a rise of one foot for every 6f feet traveled horizontally. So one in three cortesponds to a 33 1-3 per cent. grade, one in two to a 50 per cent. grade, and so on until a 100 per cent. grade is reached, which, as noted, is the equivalent of a 45 degree angle.

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INDEX

A

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Abuse of Tires
Acetylene Gas, Locating Leakage of
Adjusting Bevel Drive Gears .
Adjusting Clearances, Valve Stem
Adjusting Coil Vibrators
Adjusting Cup and Cone Bearings
Adjusting Fan Belts
Adjusting Front Wheel
Adjusting Main Bearings
Adjusting Silent Chains
Adjusting Valve Lifters, Overland
Adjusting Worm and Worm Wheel Steering Gear
Adjustment of Air Gap
Air Compressor, Automatic Control
Air Compressor, Small Portable
Air Compressor Types
Air Pressure Fuel Feed
Air Pump Construction
Air Pump, Jeffery Fuel Feed
"All Loss” Oil System
Allotment of Space in Building
Allowances for Fits in Auto Construction
Allowances for Grinding
Aluminum Soldering
Aluminum Welding
Ammeter, Delco
Angle Bender .
Angular Measurement of Grades
Annealing Cast Iron
Anti-freezing Cooling Solutions
Anti-freezing Solution Charts
Anti-freezing Substances Combined With Water
Apparatus for Battery Charging.
Arbor Press Forms
Areas of Small Circles
Arrangement of Shop Lights
Artificial Respiration, Shaefer Method
Assembling Department Equipment.
Assembling Room Furniture

PAGE
860
745
760
310
497
799
345
740
271
320
302
719
493
103
843
101
359
365
367
414

25
1022
1020
922
898
613
161
1032
912
936
944
938
459

.

86
1000

20
953
37
44

.

PAGE

139
163

476

621
103

Attachments for Lathe, Grinding
Attachments for Small Tools
Atwater-Kent System
Atwater-Kent Timer
Austin Two-Speed Axle
Autocar Double Reduction Axle
Autogenous Welding
Auto Lite System
Automatic Control Air Compressor
Automatic Spark Advance, Atwater-Kent
Automatic Spark Advance, Delco
Automatic Spark Advance, Eisemann
Automatic Speed Regulators
Automobile Power Plant, Overhauling
Auxiliary Tanks for Pressure Feed .
Axle Bearings, Types
Axle Lubrication
Axle Repairs.
Axles, Semi-floating

512

155
365

750

B

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Back Lash, In Steering Gears
Ball Bearing Crankshafts
Ball Bearing Timer .
Ball Bearings
Ball Bearings, How to Clean
Ball Bearings, Lubrication and Enclosure
Ball Bearings, Removing
Ball Bearings, Shim Adjusted
Ball Contact Timer.
Band Clutch
Battery Charging Apparatus
Battery Charging Set, Simple
Battery Ignition System Parts
Battery System Hints
Bearings, Ball
Bearings, for Axles
Bearings, Roller
Bearings, Testing Parallelism
Bench Clamps
Bench Equipment, List of
Bench Furniture
Bench Vises

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