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INDEX
Oxygen-ether 114
generator 113
use of 113
tank 102
Oxy-hydrogen flame 100
Oxylithe 113
Paint, amount for cloth screen . . 456 for blackening apparatus .... 245
for projection room 440
Painted cloth screen 457, 460
Painted wall screen 454
Paper, holding while printing. . . 379
Paper for masks 253
Paper for printing with projection 379
Paper screen 458
Parallel light, how to obtain. ... 273
Parallel, rheostats in 531
Parallelizing light 276, 335
Patching a film 428
Pen for slides •. 206, 207
Pennock, Edward 673
Pennsylvania Metallic Tubing
Co 108
Petroleum, amount to use 125
lamp 121, 123, 124
lamp, amount of oil 125
lamp, candle-power 125
chimney 122
condenser position 125
management 123
lamp for photo-micrography 386
position of flame 125
reflector 122
smoking 133
summary 136
Phenakistoscope or magic disc of
Plateau 680-681
Photographic booth 321
camera for drawing 332
enlargements with projection 378
lantern slides 200, 208
objectives for prints 379
for projection 224
objects to project with .... 268
paper with projection 379
room 320
Society, British 217
Photography apparatus 319
with projection apparatus
319,381
with Quartz spectrograph . . . 642
Photography, with spectra 643
summary 388
troubles 384
Photo-micrographic camera. . . . 382
microscope 385
vertical camera 384
Photo-Mineature Series 200
Physical Review 567-569
Physics, special projection experiments in 622
Plaster Paris screen 454
Plate, exposing directly 381
Plateau and moving pictures . . . 680
Pointer for lecturer 271
Polarity determination 506-5 1 1
by arc lamp 506
with direct current. .496, 506-511
direct current ammeter 506
direct current voltmeter. . . . 508
incorrect 51, 507
indicating on wires 51, 508
indicators, chemical 510
Nernst lamp 95
right and wrong in arc lamp
51,507
small arc 84
test 51, 506-511
testing by ammeter 506
testing by voltmeter 508
Polarized attachment plugs. .87, 504
light 622-626
brightness of screen image 626 condensers and objectives
for 625
dark room needed for experiments 626
detecting strain in lenses by . 626 projection experiments with
622-626
setting up the experiments. . 626 showing rings and brushes
with 625
small Nicol prism for 624
specimens for 623
use of piles of glass plates . 623-624
use of small prisms 624
wall socket 86, 503
Popular Science Monthly . . .321, 521 Porta, Baptista and the camera
obscura 674
Porte lumiere 140, 144
installation 140
with microscope 142
operation 143