714
OPTIC PROJECTION
Foucault, Recueil des Travaux
Scientifiques.............. 138
Fourrier ...................9,202
etMoltini ................ 621
Frame for darkening window
margins............. 445~447
for retouching slides......29, 203
French Congress of Photography 200
French lantern slides.......... 200
Frequency, of alternating cur¬
rents .................. 486
apparatus adapted to....... 495
Fuess, R...........56, 138, 150, 159
Fuse blocks, location of........ 520
Fuses....................399,519
‘‘blowing” of.............. 519
burned out..........47,519-520
capacity ................. 520
and circuit breakers.....518-519
location and installation .... 519
on each line............519-520
on house circuit..........83,520
replacement of.........520-521
wattmeter.............519-520
Gas, amount in cylinders
103-104, 129
lamps.................... 125
lighter................... 106
management.............. 127
reflector.................. 126
summary................. 136
Gases, proportion of in lime light 108
Gauges, pressure.......102, 103, 129
Gelatin for lantern slides....... 205
General Electric Co........... 553
cuts loaned by..........489-495
Generator................... 474
shunt.................... 487
Gentner (J. H. Gentner Co.).... 459
German lantern glides......... 200
“Ghost” from reflections....... 245
Glass plates for polarizing light.. 624
tinted in combined projection 177
unvarnished.............. 207
Glassine ink for writing on glass 207
Gloves, asbestos-patch.... 21, 22,109
Glower of Nemst lamp........92-93
Golgi method................ 240
Goodwin, inventor of photo¬
graphic film...........682-683
Goring and Pritchard.......283, 454
Gothic type for drawings....... 377
Gratings for spectra.... 627, 632-635
s’Gravesande.............140,146
Ground of electric current
48, 497-498
Ground-glass to diffuse light.....380
screen, transmission.461-462, 465
Guide for making lantern slides. 207
Guides for apparatus blocks.... 292
Guil pastils.................. 101
Gundlach-Manhattan Optical Co. 412
Hand-feed arc lamp......12,15,62
lamp for alternating current 68
lamp for small currents.....286
Hartford Screw Co............. 296
Hassock and Rosenberg......9, 621
Heat, getting rid of, in rheostat 523
with small currents......... 350
Heating unequal on condenser.. 58
Heliostat.................... 139
clock-driven.............. 145
for east window............ 144
for south window.......... 143
for west window........... 145
hand-regulated............ 140
how to set clock-shaft....... 147
kinds of.................. 140
lens and prism..........>57, *59
mirror parallel to clock-shaft
154, >55
settingup................. 154
one-mirror.....145, 146, 148, 150
settingup.............. 149
positions of mirror......144, 156
principle of............... 151
southern hemisphere....... 156
settingup.............. 158
two-mirror.........145, 152, 153
arranging fixed mirror. .. 154
arranging movable mirror 152
Hepworth, C. M.............. 391
Heyl, H. R...................680
Hepworth, T. C.............. 9
Historical Summary'........673-687
Hitchcock, Prof. Romyn....... 265
Holland, translucent screens in . 462
Home kinetoscope............ 435
Home-made optical l>ench.. . 288-296
projection apparatus......4, 287
rheostats..............525-530
Home projectors ............. 435
Hood, on objective............ 245
showing light centered and
not.................... 246
Hooke’s joint and rod........82,329