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728
OFTIC PROJECTION
Sp ictra, absorption and substances for 637-638
apparatus and material for, 626,643
arc lamp for 639
chemicals to use with 627, 637, 640
comparison spectra 638
current to use for emission
spectra 639
electrodes and stuffed elecc
rodes 627,638
emission spectra 638-640
gratings for 627, 632-635
illumination of the slit for ... 636
optical system for 628
optical quartz system for . 627-641
photography of 643
prisms for 627, 631-632, 642
quartz optical system. .. .627, 641 screens, white and anthracene
for 627,635, 642
slit for 626, 629-630
substance to use for absorption spectra 637-638
for emission spectra 640
ultra-violet 641-642
Spectrograph 642
Spectrographic camera 643
Specimen, stage for 239-240
Spectacles for correcting eye defects 659-672
prism and colored for stereoscopic screen images 37-3*3
Spectrum, showing visible radiation 566
Speed of shutter to prevent flicker 422-427
of moving picture machine . . 420
Spencer Lens Co., 28, 63, 81, 190, 193
196, 233, 241, 271,309-312,354,
355
Spherical and chromatic aberration 580-583
Splicing moving picture film. ... 428
Spots on screen 309
Spotting lantern slides
19, 26, 29, 201, 203, 216
Stage cooling device 239, 240
Stage, mechanical 239, 241, 242
in micro-projection 239-240
water-cell 239, 240, 608
Stain for tables 289
Stampfer's magic disc 680
Standard, aperture 571
Standard, material for installing
arc lamp 502
Stanley, Geo. C 375
Stan ton, Theodore 673
Starch polarity indicator 510
Starrett (L. S. Starrett Co.) 295
Stenopaeic slit 651-670
Stereoscopic screen images. . . .37-38
Stimson Hall 155
C. H. vStoelting Co. .33, 141, 185,302
vStoring lantern slides 218
Straite, inventor of automatic arc
lamp ooo
Stray light, avoiding 380
Striae, method of demonstrating
647-650
Style Brief, Wistar Institute 374
Substage condenser
232,271,347,619,626
achromatic 282, 626
aperture of 278
centering 280
and concave mirror 348
Kohler method with 278, 619
objectives with 281
plane mirror with 348
condenser, position 337
position depending on slide. . 281 position with different objectives 282
position with parallelizing lens 277 reduction of brillaincy by
235, 618-620
Summaries of the different chapters: I. 64; II, 76; III, 97; IV, 117; V, 135; VI, 164; VII, 198; VIII, 220; IX, 313; X, 388; XI, 438; XII, 472 Summary, alternating current. . 76
direct current lanterns 64
drawing and photography. . . 388
heliostats and sunlight 164
house circuit 97
lantern-slide making 220
lime light 117
micro-projection 313
moving pictures 438
oil, acetylene, alcohol 135
opaque projection 198
rooms and screens 472
sunlight 164
weak lights 135
Sunlight for opaque projection. . 174