1036 



Physical Apparatus for Projection. 



Heat. 



54.788. Glass sphere with tube closed at top, for 

 showing the expansion of liquids 



54.789. idem, with open tube 



54.790. idem, without filling for expansion 

 of air 



54,806. Apparatus for linear expansion of rigid 

 bodies 



54.819. Projection water dilatometer 



54,827. Expansion-anomaly of water after Wais 



54,832. Glass tube for circulation of water . . 



54,837. Apparatus after Riihlmann for showing 

 the expansion of water at constant pressure 



54.854. 3 small thermometers with different 

 liquids 



54.855. Projection thermometer, divided from 

 40 to +50 C 



54.856. idem, divided from 10 to +160 C. 



54.857. Projection thermometer with long stem, 

 divided from to +30 C., graduation Vio 



55,015. Freezing thermometer 



55,036. Apparatus after Boutigny for the Leiden- 

 frost experiment 



55,090. Andrews' Press for compressing and lique- 

 fying carbonic acid 



55,123. Apparatus for the critical temperature 

 phenomena 



55,123a. Protecting case for above 



55,254. Sectional model of a steam cylinder . . 



55,291. Apparatus for demonstrating thermal 

 conduction in metal rods 



55,296. Apparatus for demonstrating the different 

 thermal conductivity of copper, lead and wood 



55,301. Gypsum slab for showing the elliptical 

 propagation of heat in crystals 



55,311. Apparatus after Despretz, for showing 

 decrease of temperature with distance. . . 



55,342. Small flat flask for filling with carbon 

 bisulphide and Jodine 



55.345. Plane parallel vessel for alum solution . 



55.346. the same, entirely of glass 



55.347. Absorption of heat rays 



Magnetism. 



60,072. Molecular magnet model 



60,079. 2 Small magnets, 1 horseshoe and 1 bar 

 magnet 



60.082. Iron Powder, per 250 g 



60.083. Sifter for above 



60,089. Declination needle 



60,096. Dipping circle 



60.137. Magnetic pendulum, as suggested by 

 Russner 



60.138. -- The same apparatus, for placing on 

 the optical bench of projection apparatus . 



Static Electricity. 



60,186. Electroscope (v. Beetz's) 



60,196. Aluminium electrometer (Kolbe's) '. . . 

 60,197 60,199. Accessories to the aluminium 



electrometer 



60,202. Aluminium leaf electrometer (Grimsehl's) 

 60,203 60,205 and 60,208 60,210. Accessories 



60.206. Graphite Conductor for demonstrating 

 the potential drop in electric leads .... 



60.207. idem, with graduation 



0. 1. 8 



0. 1. 8 



0. 1. 8 



2. 10. 



0. 7. 



0. 8. 



0. 8. 



0. 12. 



0. 16. 



0. 6. 



0. 6. 



0. 12. 



0. 7. 



2. 0. 



2. 4. 



0. 6. 



0. 12. 



2. 6. 



0. 12. 



0. 14. 



0. 5. 



0. 16. 



0. 1. 9 



0. 12. 



0. 5. 



0. 16. 



1. 16. 



0. 5. 



0. 1. 9 



0. 1. 6 



0. 9. 



1. 4. 



7. 10. 



6. 5. 



1. 2. 



3. 0. 



0. 16. 

 3. 10. 



1. 18. 



1. 10. 



1. 17. 



s. (1. 



Absolute Lecture Electrometer, as suggested 

 by Braun, for projection, see No. 60,211 to 

 60,215 and 60,216. 



Volts 01500 01500 3500 

 graduated from IOC to 100 500 to 500 100 to 100 Volte 



2.18.0 2.7.0 3.2.0 

 idem. 



Volts 3500 10 000 



graduated from 500 to 500 500 to 500 Volts 

 2.10.0 3.12.0 



60,217. Metal beaker for graduating 3. 0. 



60,223. Pendulum electrometer (Weinhold's), for 



verifying Coulomb's law 4. 



60.280. Leaf electrometer 2. 



60.281. Accessories for graduating 2. 



5. 



8. 



8. 



60,283. i d e m, by Faraday's" method . . . 0.16. 

 60,324. Standard condenser for aluminium electro- 

 meter by Kolbe . . . .' 0. 18. 



60,649. Repulsion apparatus (Puccianti's) ... 0. 16. 



Voltaic Electricity. 



60,682. Zinc and copper plates for electrometer 



(Grimsehl's) (see Voltaic Electricity) .... 1. K.. <> 



60.703. Pile electrometei 3. 5. 



60.704. idem, with open piles 3. 15. 



60,739. Small projection cell (Kolbe's) 0. 8. 



61,293. Vertical galvanpscope 1. 13. 



61,384. Projection moving coil galvanometer . . 4. 0. 

 61,562. Demonstration of hot wire instruments 



after Scotti 1. 10. 



62,115. Apparatus for showing the generation of 



heat by the electric current 0. 10. 



62,188. Voltameter 0. 12. 



62.216. Apparatus for objectively demonstrating 

 electrolytic decompositions and crystalli- 

 zations 0. 14. 



62.217. Saturn's tree inset for above 0. 4. 



62,231. Apparatus for electric endosmose ... 0. 10. 



62.237. Migration of a drop of mercury by the 

 inequality of surface tension produced electro- 

 lytically 0. 8. 



62.238. Capillary galvanoscope, after Weinhold . 0. 12. o 



62,280. Electromagnet after Weinhold 2. 4. 



62,365. Apparatus after Topler, for the existence 



of the magnetic curves 1. 4. 



62,370. Explaining the lines of force theory after 



Berghoff (horizontal projection) 4. 0. 



62,422. Apparatus for the rotation of liquid con- 

 ductors (horizontal projection) 0. 12. (l 



62,483. Showing damping by induction (hori- 

 zontal projection) 0. 18. 



62.903. Demonstration apparatus for rotating 



field experiments 6. 0. 



62.904. 4 Glow wires for above 1. 0. 



62,931. Apparatus for demonstrating the flow 



of current in three-phase conductors . . . 1. 10. () 

 63,443. Electrothermic apparatus after Schumann 1.12. 



Divers Apparatus. 



55.414. Radiophone after Weinhold 0. IS. o 



55.415. with a zinc sector disc 0. 14. 



55.503. Rotary star chart 2. 0. 



55.504. Universal clock 1. 8. 



63,181. Electrometer for investigating radio- 

 active substances 4. 0. o 



63,183. Electrometer after Curie 6. 0. 



