1104 



Alphabetical Name and Subject-matter Index. 



Page 

 Differential prism 502 



- tackle 266, 271 



- thermometer (thermoscope) 588 



- thermoscope 588, 595 



- wheels 324 



- windlass 329 



Diffraction and interference 



543550, 556, 560 



- apparatus 548 



- chromoscope 550 



- on the Paalzow optical 

 bench 561 



Diffusion of gases . . . 410, 411 



- photometer 468 



Digester, Papin's 606 



Dilatation thermometer .... 588 

 Dilatometers .... 571, 572, 575 

 Diminution of pressure appa- 

 ratus 354 



Dimming switch, see vol. I. 



Dip circle 787, 790, 791 



Dipping needle 790 



Direct current dynamo, explain- 

 ing 988 



dynamos .... 992 994 



for machine drive 

 see vol. I. 



- motor 992, 997 



- -direct current transformers, 



see vol. I. 



- vision prism .... 502 (560) 



- spectroscope 509 



Directing magnet for galvano- 

 meters 875 



Direction of current determined 911 

 Disc, machine 815, 816 



Poggendorff's . . . 287, 1017 



- shaped lever, explained . . 275 



- stroboscopic 432, 525 



- water meter 355 



- with hole and glass lid . . 250 



- with Schwerd apertures . . 547 



- with spectrum colours . . 284 



- with uranium oxide . . . 1029 

 Discharge and mechanical motion 837 



- chock, magnetic and induc- 



tive effect 829 



- electrometer 841 



key 868 



- oscillatory character . . . 1038 



- tube after Zehnder .... 1043 



- for resonance vibrations 838 

 Discharger 834, 835, 1033 



- with pendulum 811 



Discharging water-drawing wheel 357 



Discontinuous syphon 38 1 



Disengaging belt gear 328 



Dishes for crystallising . . . .217 



- for pulverising 215 



- of asbestos 210 



Dismountable transformer 1006, 1007 



Dispersing lens 494- 496 



Displacement of a floating body 



344 348 



- of phase produced .... 900 

 Displacing apparatus* . . 345, 346 



- bodies 346 



- cylinder 250 



Dissipation cylinder 1029 



Di>solving tension of salts . . 364 

 Distillation tables see vol. I. 

 Distilling apparatus for merrury 399 

 Distributing apparatus . 805, 806 

 Distribution, electric 811 



- of magnetism in a bar magnet 788 



- of pressure in tubes . . . 33(i 

 Diver, Cartesian .... 382, 383 

 Divided circle and index for Nicol 



prisms 559 



Dividing engines .... 227, 228 



ruler 222 



Diving bell 366 



Page 



Divisibility of fuchsin 250 



Dobereiner, Hygrometer .... 652 



Tinder box 410 



Dobrovolski, Ammeter 905 



Dolezalek and Kriiger, Current 



flowing through a liquid . 848 



- Quadrant electrometer . . 843 

 Dolger, Tuning fork exciter 



clamp 440 



Donny, Water hammer .... 606 



Doppler's Principle 283 



Doppler, Theorem 935 



Double absorption box . . . .516 



- and differential thermoscope 



after Kolbe 595 



barrel vacuum pumps 



389. 392394 



- bridge, Thomson's .... 927 



bulb for gas expansion . . 250 



- calorimeter 618 



chamber air thermometer . 582 



commutator 935 



- conductor with plug contact 



for experiments with Kol- 

 be's thermoscope 598 



cone on inclined stand . . 274 



- coupling, Cardan's .... 317 



- cycloidal railway 267 



- electric pendulum . . . .811 



whirl 825 



- excentric with reverse motion 3 1 8 



fan 405 



- gap . . 512 



glass vessels for comparison 



of electric resistance . . . 599 



grating 548 



- gun 252 



- hooks for suspending rods 797 



hook weights . . 260, 273, XV 



- inlet channel slide valve . 633 



key 868 



- for Wheatstone bridge. 919 



needle 968 



- oscillograph 900 



- pachy trope 1003 



pendulum 297 



- after Airy 451 



electrodynamic .... 969 

 magnetic 787 



- pin gearing 319 



- plate after Bravais .... 565 



plates, double refracting . 566 



- prism on stand 500 



radiometer 1021 



- refracting prisms 560 



- refraction . 416, 556, 562 566 



- regulating cock 825 



- roller 827 



rotation influence machines 



819821 



- screen 646 



siren 422, 423 



- socket, universal 202 



- sphere on stand 410 



spherical condenser . . . .811 



strand for resistance thermo- 



meter 587 



- thermoscope (Looser's) . . 589 



trough after Hallnaclis . . 502 



- universal coupling 317 



vessels of glass 597 



- walled capsule (112 



Dove, Chord siren 421 



- Polarisation polyoscope . . 563 

 Draining and drying apparatus. L'SL' 

 Draught apparatus 408 



- boxes, draught pipes, see 



vol. I. 

 Drawings for showing the blind 



spot 523 



Drawn brass tube ( Hebenstorff'.s) 



41!), 569 



Page 



Drebbel, Thermoscope 568 



Drenteln. Resonance apparatus 443 



Sound interference tube . . 4H-J 



Dressing machine 354 



Driving device Mini 



Drop of potential 810 



Dropping apparatus (surface ten- 

 sion) 302 



- pipette 362 



vessel for mercury . . . . 215 

 Drude, Dielectric constant of li- 

 quids 1045 



- Tesla transformer with Ley- 



den jar 1(I4."> 



- Wavemeter .... 1044, 1045 

 Drum armature 991 



- pyrometer 569 



rheostat 916 



stroboscopic .... 417, 525 



- Tyndall's 486 



Drumstick for striking tuning 



forks 439, 440 



Dry cells 850, 935 



- cell battery box 886 



Drying and draining apparatus. 282 



- apparatus for the air pump 401 



- cylinders 219 



device for paper tube . . . 797 



- tubes 219 



Dry-plates 1074 



Du Bois, see letter B 



Duboscq, Polarisation apparatus 551 



- Projection polarisation appa- 



ratus .~>.~>2 



Dubrowsky, Influence machine 



813, 817 



- -Loossr, Aspirator action . . 598 

 Ducos du Hauron, Anaglyphon 



(plastoscope) '<-'.> 



Ducrue, Projection parabola . . 264 



Duhamel, Vibrograph 456 



Dulong, Thermal radiation appa- 

 ratus 648 



Dulong and Petit, Calorimeter . 62o 



- Linear expansion . 570 



- Mercury expansion 574 

 Dulong and Petit 's Law . . . .617 

 Dumas, G-as and vapour densities 613 

 Duplex barometer 371, 372 



- pressure gauge 369 



- vacuum pumps .... 392 394 

 Duration of luminous impression 525 



Diirr, Boiler 636 



Dust figure apparatus 434, 442, 44(1 



- figures, Chladni's 44 -2 



- proof lock-up cupboards for 



influence machines . . . s - J I 

 Duter, electric constriction . . situ 

 Dutrochet, Endosmometer . . . lid I 

 Dvorak, Mechanical effects of 



sound 463. Id I 



Dynameter after Ramsden . . .VI it 



Dynamic balance -,~>2 



Dynamics and statics . . 265 411 

 Dynamoelectric induction in dy- 

 namos 987 '.ml 



- principle -'ss 



Dynamometer -.">- 



- models (friction brakes) . . :>.'!- 

 Dynamometers for cloth and 



yarns see special list. 



- (spring balances) 310 



Dynamometrical measuring in- 

 struments 910, 911 



Dynamos, direct current, for ma- 

 chine drive, see vol. I. 

 explanatory models . .987 991 



for generating current 992 9!t4 

 Dynaphor. Heil's (The apparatus 



cannot be furnished). 861. X \ 

 Dynmeter 7SI5. 1072 



See also the Subject-matter Index in vol. I. 



