1116 



Alphabetical Name and Subject-matter Index. 



Page 



Nestler, Axial cross 1066 



Nets of wire 210 



Neumann, Heating apparatus 



(Neumann's tap) 617 



- Light refraction apparatus . 484 

 Neutralisation heat 625 



- of opposite kinds of electri- 



city 799 



Newton, Colour disc 504 



- Colour glasses 544 



- Crossed prisms 500 



- Reflecting telescope, model 531 



- Rings, interference . 285, 543 

 Transparent colour disc . . 529 



- Tube (fall tube) . . . 404, 405 

 Niaudet, Tuning fork clock . . 463 

 Nicholson, Hydrometer .... 346 

 Nickeled hollow balls 812 



- metal sphere 548 



- plane mirror 596 



Nickelin wire 870 



Nickel-plating 949 



Nickel-steel compensating pen- 

 dulum for standard clock . 247 



Nicol Prisms 565 



- Prism in brass mount . . . 559 

 Nicol with sharp edges .... 560 

 Niembller, Endosmometer . . . 365 



- Mechanical demonstration of 



the laws of refraction . . 493 



Nippoldt, Telephone bridge . . . 928 



Nitrogen dioxide tube 613 



Nitrosyl chloride tube 613 



Nitrous oxide tube 613 



Noack, Apparatus for the study 



of potential .... 809, 810 



Burner for monochromatic 



light 512 



- Compensated water dilato- 



meter 572 



- Discharge tube for resonance 



vibrations 838 



- Explaining of Wheatstone 



bridge 917 



- Goniometer for student's use 480 



- Liquefying gases 612 



- School galvanometer . . .881 



Voltaic fundamental experi- 



ments 839842 



- Zamboni pile 809 



Nobert, Photographed grating . 549 



Nobili, Colour rings 947 



- Multiplier 880 



Nodal lines, concentric .... 442 



- point of tuning fork . . . 439 

 Node position of a swinging horse- 

 hair 442 



Nee, Thermopiles 1063 



Nollet, Percussion apparatus . . 303 



Nbrrenberg, Mica combinations . 565 



- Polarisation apparatus . . . 553 



- Sound interference tube . . 461 



- Subjective colours .... 527 

 Nut. rotary 313 



OisU stand 260, 265 



Oberbeck, Cross pendulum . . . 297 



Double pendulum 297 



Object carrier 538 



- holder, rotary . . . 557, 560 



- micrometer 537 



Objective chemical spectra. . . 513 



- for solar microscopes . . . 540 

 open 558, 560 



- reading device 890 



telescope 890 



Oblateness of a sphere of oil . 281 



Observation tube 560, 562 



Octagonal wire grating . . . .1042 



Page 

 Ocular glass micrometer .... 537 



- micrometer (Fresnel's) . . . 545 



- net micrometer 537 



- prism for telescope .... 543 



- spectroscope for telescope . 543 



- with gap for demonstration 



goniometer 479 



Odstrcil, Apparatus for Coulomb's 



law 809 



- Pendulum electrometer 804, 812 

 Oerstedt, Deflection of magnet 



needle 949 



- Piezometer 358, 359 



Ohmann, Field goniometer . . . 229 

 Ohm for school use 913 



- single 915 



Ohm's Law 911931 



- hydrodynamic expla- 

 nation 917 



Ohmmeter 928 



Oil-condenser with variable ca- 

 pacity 1038 



Oil-damping 891 



Oil-insulated high tension trans- 

 former 1035 



Oil transformer for high tension 1031 

 Oil-vacuum pumps .... 390 397 



Oldham, Coupling 315 



Olszevski, Demonstration appa- 

 ratus for generating liquid 



air 610 



Costing, Laminated mirror . . . 504 

 Open mercurial pressure gauge . 369 



objective 558, 560 



- pipe 428 



Opera and field glasses .... 540 



Ophthalmotrope 522 



Oppelt, Siren disc .... 283, 420 

 Oppolzer, Reading machine . . 250 

 Opposed and unidirected currents 968 

 Opposite kinds of electricity neu- 

 tralised 799 



Optics 465566 



Optical apparatus, Mach's . . . 498 



- Zwick's 496 



- bench 497 



- after F. C. G. Miiller . 473 



- after Paalzow . .556 558 



- after Weinhold .... 472 



- for explaining micro- 

 scope and telescopes . . .531 



- for interference and dif- 

 fraction experiments . . . 547 



- for short wave apparatus 1041 



- disc after Hartl . 488490, XV 



- experiments with the gonio- 



meter 481 



eye 523 



fatigue 526 



- illusions 528 



- instruments 530 543 



- measuring instruments . . 499 



- outfits for projection lan- 



terns: see vol. I. 



- pyrometer 587 



Opto-electrical experiments . . 1026 

 Opto-electric telegraphy .... 1053 

 Oral cavity, resonance .... 439 

 Organ pipe Mach's 433 



- mouthpiece 427 



Oscillating cross slot 315 



- double crank 314 



- movement 325 



- prism 285, 504 



- slot and crank 314 



steam cylinder 631 



- thrust crank 314 



Oscillation analysing apparatus. 837 

 Oscillations and vibrations shown 



with the stroboscopic cy- 

 linder ' . 283 



electric 1030 lo:>3 



Page 

 Oscillations forced 'JUT 



- of liquids 298 



Oscillatory character of dis- 

 charges 837, 1036 



discharges, stroboscopic 



analysis 526 



Oscillographs 900 



Oscillograph tube 897 



Osmose apparatus . . . 364, 365 



- of gases, shown with Kolbe's 



thermoscope 598 



Osram metal filament glow lamps 995 

 Ostwald, Air bath 210 



- Capillary electrometer . . . 946 



- Clare standard cell .... 844 



Conductivity of electrolytes 



930, 931 



- Measuring wire 930 



Thermostat 930 



- Vessel for conductivity meas- 



uring 930 



Otto, Horizontal gaz engine 629, 630 

 Oudin, Currents of high frequency 



and voltage 1035 



- High frequency apparatus: 



see special list. 



Resonator 1037 



Outfit for specific gravity de- 

 terminations 237 



Outfits, photographic 522 



Outflow apparatus . . . 350, 351 



- experiments .... 334, 354 



- velocity of gases 411 



Outflowing gases 408 



Over-cooling of water 600 



Overflow apparatus 574 



- pipettes 220 



vessels 2,~>o 



Overlapping of the images . . . 524 

 Overshot water wheel . . 355, 356 



Overtone apparatus 447 



Oxidation-reduction cells . . . 847 

 Oxygen bombs see vol. I. 



- burners, see vol. I. 



retorts, see vol. I. 



Ozone generating tube . . . .1017 



Paalzow, Optical benches .556-^558 



Oscillatory character of dis- 



charges 1036 



Volumnometer 380 



Pachy trope for induction coils . 981 

 Pacinotti, Ring armature . 288, 987 

 Pacinotti-Gramme .Machine . . . 289 



Paddle wheel 357 



Page, Electromagnetic motor . . ( .i~>7 

 Pair of bulbs after Violle . . . 651 



of cpils for galvanometer . 882 



- of plates, Volta's 839 



- of spur wheels with weights :>2!l 

 Paladium-hydrogen apparatus . 853 

 Palmer, Micrometer gauge . . . -'-J3 

 Palmieri, Earth inductor . . . '.'7- 



I'.lcctrophorus 815 



Pamphlet by Dr. Zwick .... 4'J7 

 Pan of balance 2tn, 2sil. 311, 571 

 Pannellings for lecture theatres 

 etc.: see vol. I. 



Pantenius, < 'oherer 1 o.M 



Paper balances: see special list. 



condenser . . . 900, 934, 1013 

 -r- condenser for singing arc 



lamp I""-* 



electroscopes 799, 811 



for filtring 2-_'o 



membrane's 442, 4-4.'i 



- strip for recording pressure 



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



