Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures (1914)

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INDEX PAGE Abbe diffraction theory 644-647 apparatus for 644 demonstrating to an audience and to an individual . . . 646-647 grating needed for 644 light for 646 Abbe substage condenser 273, 280, 626 Abbott, the Sun 139 Aberration, chromatic and spherical 580-583 maximum and minimum. 582, 589 Absolute temperature 547 Absorption spectra 637-638 comparison spectrum with 637-638 glass box for use with 637 substances for 637-638 Accommodation in vision 651, 656-659 Kepler's theory of , . 657 lantern slide for experiments 656 necessity for 657 produced by muscular effort 659 Scheiner's theory 658 Acetylene, flame and lamp. .127-130 amount in prestolite tank. . . 129 position of lamp 128 summary 135 Achromatic and aplanatic combinations 581-583 substage condenser 272, 626 Adam's Essays 142 Adapters for small carbons in large lamp 80 Advertising Magic Lanterns .... 435 a-k on microscope slide 361, 387 Alcohol, burner 130 ethyl, methyl and denatured supply 130 Alcohol lamp 131 lighting 131 precautions, with 133 putting out 133 summary for use 137 Alco-radiant 130 Alternating current 475 advantages 475 PAGE amperage 484 arc 542 arc, form of lamp 68 ballast with 544 carbons for 87, 552 cycle 486 disadvantages with arc lamp 68, 475 frequency 486 how produced 475 magic lantern with 68-77, 87 micro-projection with 284 power factor with 485 radiant efficiency of arc. .568-569 summary for use with the magic lantern 76 units of 484 voltage 484 watts with 485 wiring 69, 512 Ambronn's Handbuch, Astrono mische Instrumente 138 American, Institute of Electrical Engineers 500 Journal of Science 157 lantern slides 200, 201 Microscopical Society 383 Ammeter 479, 510 alternating current 73 connections 480-482 direct current n, 481 does not register 52, 510 external shunt 479 in projection 236, 481 need in micro-projection .... 236 precautions for use 481 self-contained shunt 479 soft-cored 510 to measure current 479 testing polarity with 509, 510 Amperage 476, 484 alternating current 484 carrying capacity of copper wires 500 cords and cables 501 for different forms of projection 500 found by Ohm's law 521-522