706 



OPTIC PROJECTION 



found by wattmeter 483 



varying with inductor 532 



Ampere 476 



Amperes and volts in transform- 

 er 533 



Amplifier 229-600 



actual magnification and im- 

 age 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 depend- 

 ent 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 demonstrat- 

 ing . 670-672 



Anthracene screen for ultra- 

 violet 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 ma- 

 chine 406 



relation of condenser and 



objective 274 



standard for moving pictures 406 



substage condenser 278 



substage condenser to objec- 

 tive 233 



with directed light 610 



Apparatus, adapted to frequency 495 

 arrangement with sun pro- 

 jection 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 cur- 

 rent 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, 54 s 



inclined. . . .543, 545, 54 s 



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 



