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712
OPTIC PROJECTION
size condenser to use 331
size and lettering 376
small 330
small arc lamp, for 340
summary 388
surface horizontal 322
surface vertical 32 1
table 324
with mirror attached . 323-325 with movable shelf . . . 325-326
tracing 374
troubles in 384
varnished slides for 205
wall diagrams 329
Dresbach, Dr. Melvin 651
papers on eye defects 659
Durand, Dr. Albert C 651
Dust to show light rays 247
Dynamo 474
connected directly to arc lamp
486-488
special for arc lamp 486
wattmeter to measure power delivered by 482
Eastman Kodak Co. ...212, 215, 319
Eclipse voltmeters and ammeters 510
Ecliptic 163
Edinger 345
apparatus, erect images with 373
large apparatus 360-362
outfit for small arc lamp and
ordinary microscope 363
vertical apparatus 360
Edison, Thomas A., figures loaned by and text references
113, 400, 406, 418, 429, 435, 686
"Effects" with multiple lanterns 34 with single lanterns 36
Efficiencies of current and carbon arrangement 560-562
Electric, apparatus, list of. .474, 499
arc 535-538
circuit 496
fan for drawing room 320
flashlight 14
measurements 475-486
supply, connections to ... 502-505 units 475-478
Electrical behavior of arc . . . 536, 539 World 553
Electrodes, of carbon 539
and potential drop at arc 536-539 for spectra 627, 638
stuffed with various substances 638, 639
Electromotive force, unit of .... 476
Emission spectra 638-643
arrangement of the electrodes
for 640
automatic arc lamp for ... 638-639
current to use for 639
different appearances with positive and with negative
electrodes 640
electrodes for 640
yellow-flame carbons for. ... 638
Enclosed knife switch 517
Energy losses in projection . . 603-609 comparison of in water, etc . . 607
example of 609
in the condenser 604
in the projection objective . . 609
in sheet mica 608
in the specimen 607
table of 607
Energy, required for projecting
moving pictures 57O-571
with inductor and rheostat . . 533
Energy transmission 606
table of absorption and transmission 607
English Mechanic 221
English Photographic Club 29
Enlargements with projection
apparatus 378
Enterprise Mfg. Co 101
Episcope for drawing 332
Equivalent focus 580
Erect images, in drawing .... 359-373 with two projection lenses 368
Ether saturator 113
Ewon's automatic lamp 548
Exhibition, with, alcohol light. . 132 alternating current lantern . . 73 direct current magic lantern 19
high powers 271
lime light no
mazda lamp 92
moving pictures 433~435
Nernst lamp 95
opaque lantern 179
projection microscope 270
room lighting, 19, 52, 66, 96-99, 1 12, 120, 143, 175, 235, 303, 314, 320, 395, 441-443, 626, 633 with small arc lamp 90