INDEX 



713 



Exhibition with sunlight 161 



Experiments, on flicker 423-427 



with projection in physics 621-651 



with polarized light 622-626 



with vision, normal and defec- 

 tive 651-672 



Explosion with lime light 107 



Exposing dry plates directly to 



the projected image 381 



for printing by various lights 214 

 with projection apparatus. . . 380 

 Eye, accommodation for distance 



657-658 



as a part of projection appara- 

 tus 4 



demonstration of normal vi- 

 sion 654 



inverted image on the retina 



655-656 



prevalence of defects 659 



refractive defects 659-672 



two eyes unlike 670 



Fan, electric in drawing room . . 320 

 Faraday and moving pictures . . . 680 

 Field, need of large, in micro- 

 projection 254 



and objectives 254, 255 



Filament, position of (mazda 



lamp) 91 



Filar micrometer ocular 234 



Film, burnt in concentrated light 432 



celluloid 431-432 



direction of motion 419-420 



effect of opacity on energy 571 



inspection of 427-428 



invented by Goodwin 682 



lantern slides 215 



magazine 407 



security from fire by . . 43 1-433 



mender 429 



position in machine 415 



splicing 428-429 



threading 417-418 



Finimeter 103 



Fire, danger from 431 



escapes 443 



-proofiing curtains 321 



Fire-shutter 420, 431-433 



automatic 420 



Firetrap, security o r 431-433 



Fire Underwriters 498-505 



regulations 399 



Fish, Dr. P. A 289 



Flexible metallic tubing 106 



Flicker 423-427 



curve 424 



experiments on 426 



formula of 426 



position of shutter to prevent 



422-423 



table on speed 427 



theory of 426-427 



Fluorite in apochromatic objec- 

 tives 583 



Flux of light in projection . . . 172, 614 



Focus, or burning point 578 



condenser and objective. .587-592 



conjugate 579 



principal focus 578-582 



principal, how to obtain 579 



Focusing 28, 30 



device on the microscope. ... 241 

 device with the magic lantern 



objective 28 



image on screen 28 



for photographing 379 



of screen image for micro- 

 projection 256 



Folmer & Schwing 212 



"Fool-proof" 7 



Formula, for absolute and centi- 

 grade temperature ....... 547 



amount of gas in a cylinder 

 of acetylene, hydrogen or 



oxygen 104, 129 



black table stain 289 



determining visibility 227 



dioptry and focus of lenses 229-230 

 electric quantities, Ohm's law 



483-485, 501-502, 522 

 flicker with moving pictures 426 

 intrinsic brilliancy of the sun 



I.38-I39 



light flux passing an objective 



172,613 



magnification 260-262 



making lantern slides direct 



2OI, 2O5-2O8 



size of screen and focus of 



projection objective. . .467-470 

 sizing and painting screens . . 456 



starch paste 375 



table black 289 



Foucault, method of detecting 

 inhomogeneities by dark 

 ground illumination . . . 650-65 1 



