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INDEX
725
Projection apparatus, exhibition 270
on house circuit 234, 285
illumination for, 237, 247, 251, 271-282, 328, 335, 347, 598, 601
limitations 223-224
on market 296
solar 142
microscope 221, 234, 249, 271
use 249
defective vision demonstrations 659-672
moving pictures
409, 420, 433, 593
microscopic specimens 269
multiple lanterns 34
normal vision 652-659
objective 18, 224, 464
shield for 292
objectives, micro-projection
224-226, 244, 263 objective for moving pictures
406, 412
ocular 230-234, 280, 366, 600
optics of 572
position of carbons for 49-50, 249, 342, 415, 507, 537-550 room, form and darkness . 440-444
specimens for 252, 268
table 287
with drawing shelf 325
with vertical microscope. . . . 267
with weak lights 120
Projectors for home use 435
Projectoscope combination. .185-186
universal 302
Proportion of gases for lime light 108
Pseudoscopic effect 39
"Push-through" slide carrier. ... 23 Pupil for eye experiments . . . 65 1 , 669
effect of size in vision 669
Ptolemy, phenomena of refraction 576
Quartz optical system for ultra
violet 641
spectrograph for ultra violet 642 system for spectra of ultra
violet 641
Queen & Co 166
Radial lines for showing eye
defects 662-667
Radiant or light source, 1 1, 68, 78, 90,
92, IOO, 113, 119, 121, 125, 127,
130, 138, 553
Radiant, arrangement and centering 39-46, 56
distance from condenser. ... 41
for drawing 328, 329
Radiant efficiency 567
and mirror. 189
energy for moving pictures with alternating current. . 570
direct current 571
for opaque projection 1 74
position and illumination of
condenser 42
position of in opaque projection 174
tilted 188-196
Radiation, light energy of. . .566, 569
visible and invisible 566
Ramsden's Circle or disc 230
type ocular 234
Reactor 532
Read, E. A 673
Rectifier for alternating current 489
Red lights near exits 443
Reducing valve for gas cylinders 102
Reflection 572
irregular 572~573
law of 140, 572
losses by 175, 602
metallic surfaced screens. . 458
mirror 573
regular 572
semi-regular 573~574
of various screens. .460, 463, 465 visibility of reflected beam. . 573
Reflector, acetylene lamp 127
gas lamp 126
in opaque projection 175
petroleum lamp 122
Reflectoscope 180
Refraction 575~576
at plane surfaces 575
at curved surfaces 575
air to glass 575
air to water 575
density and refraction 576
index of 576
law of sines 576
Ptolemy's laws of refraction 576 Snell and Descartes law of
sines 576
Refractive eye defects 659-672
Regulations, fire underwriters,
for wiring 499~5O5
Reichert 82, 83, 93