tteries. Instructing users of 449
Farm lighting batteries. Jars used in 436
Farm lighting batteries. Loads carried by 443 (Charts omitted)
Farm lighting batteries. Location of plant 444
Farm lighting batteries. Overcharge of 455
Farm lighting batteries. Power consumed by appliances connected to 442
Farm lighting batteries. Prest-O-Lite 460
Farm lighting batteries. Selection of plant 440
Farm lighting batteries. Separators for 438
Farm lighting batteries. Size of plant required 442
Farm lighting batteries. Specific gravity of electrolyte of 438
Farm lighting batteries. Troubles with 458
Farm lighting batteries. When to charge 455
Farm lighting batteries. Wiring of plant for 444
Filling and testing service 291
Flames for lead-burning 211
Floor. Care of 188
Floor grating for shop 188
Floor of shop 186
Forming plates 11
Freezing points of electrolyte 67

G

Gassing causes shedding 74
Gassing. Charging rate governed by 112 and 202
Gassing. Definition of 31
Gassing. Excessive, causes milky appearance of electrolyte 86
Gassing of sulphated plates 40 and 75
Gassing on charge 37? and 202
Granulated negatives 78
Granulated negatives. Caused by age 78
Granulated negatives. Caused by heat 78
Gravity. (See Specific Gravity).
Grids. Casting 9
Grids. Composition of 9
Grids. Corroded 77
Grids. Effect of age on 78 and 80 and 342? (344)
Grids. Effect of defective grid alloy on 73
Grids. Effect of impurities on 77 and 78 and 80 and 342
Grids. Effect of overheating on 78 and 80 and 342?
Grids. Resistance of 48
Grids. Trimming 10

H

Handling and mixing acid 222
Heating of negatives exposed to the air 78
High rate discharge testers 181
High rate discharge tests 266 and 267 and 374
Home-made batteries 25
Hydrogen and compressed air lead-burning outfit 147
Hydrogen and oxygen lead-burning outfit 146
Hydrometer. What it consists of 60
Hydrometer readings. Effect of temperature on 65
Hydrometer readings. How to take 61

I

Idle battery. Care of 67
Idle battery. How it becomes discharged 89
Idle battery. How it sulphates 70
Illuminating gas and compressed air lead-burning outfit 149
Impurities 76
Impurities which attack the plates 77
Impurities which cause self-discharge 76
Incoming batteries. Examining and testing 317
Incoming batteries. General inspection of 320
Incoming batteries. Operation tests on 320
Incoming batteries. When it is necessary to open 326
Incoming batteries. When it is necessary to remove from