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706
OPTIC PROJECTION
found by wattmeter 483
varying with inductor 532
Ampere 476
Amperes and volts in transformer 533
Amplifier 229-600
actual magnification and image 257
image formation with 600
magnification due to 600
on projection microscope .... 238
Anatomical Record 289, 320
Anatomische Gesellschaft 363
Angle, closing of light 61 1
brilliancy of image dependent on 611-613
visual 210
Anisometropia, unlike refraction
in the two eyes 670-672
Anthony & Co 210
appearance of the screen
image 672
source of light for demonstrating . 670-672
Anthracene screen for ultraviolet 635
Aperture, 172, 233, 274, 278, 406, 601, 609-611, 616
and light losses 601
effect of 609, 610-611
image formation and 615
of condenser, to increase. ... 616 of microscope objective. .615-616 of projection objective, in opaque and transparency
projection 172
plate of moving picture machine 406
relation of condenser and
objective 274
standard for moving pictures 406
substage condenser 278
substage condenser to objective 233
with directed light 610
Apparatus, adapted to frequency 495 arrangement with sun projection 286
blackened 242
block and its construction 291-294
block, guide for 292
block, size and weight 29 1
home-made 287-296
Apparatus for, drawing and
photography 319
drawing with the microscope 354 electric currents and arc lamps 474
lantern slide making 200
lantern with alternating current 68
lantern with direct current . . 9
house lighting system 78-99
lime light 100
oil, gas, acetylene, alcohol. . . 1 19 measuring radiant efficiency 567
micro-projection ". 221
moving pictures 390
opaque projection 166
photography 319, 643
polarized light 622
preparation of lantern slides 200
projection microscope 221
rooms and screens 439
small current arc lamps 78
sockets and stems 292
spectra 627
sunlight 138
ultra-violet light 627-641
vision experiments 651-672
Apochromatic objectives. . . 583, 600 compensation oculars for .... 600
Arc 535
alternating current 549
carbon 537, 539
cause of light from 546
characteristics of 486
construction of 535
direct current 1 1, 536
electric 535
electrical behavior of direct
current 536
figure of, 507, 537-538, 540-543.
545, 54s
inclined. . . .543, 545, 54s
lamp for spectra 628, 639
length and potential 538
length and voltage 53*
parts of 536 537
parts as source of light 547
right-angled figures of
507, 538, 540-542 stream and bright violet lines 546
vertical 537
voltage 476, 536, 538, 544
with 10 and 20 amperes. 249-540