Xo. 54 968. 



Looser Thermoscope. 



593 



Pi 



54 968. 1 : 9. 



54,967. Accessories for Experiments on Heat from chemical combinations, Figure (Experiments Nos. 100 

 to 115) 



s. d. 

 10. 



f 1 large Hemisphere with straight tube. 



1 spherically widened Vessel (Pig. 47). 

 f 1 large Beaker. 



1 cylindrical Glass with lid (Fig. 38). 



1 Receiver with capsule and cover (Fig. 38). 



1 Apparatus for combining ammoniacal gas with 

 It carbonic acid, with rubber bellows (Fig. 39). 



2 rectangular bent Copper Rods. 

 2 Bunsen Burners No. 51,184. 



54,9&7a. Small Collection of Accessories for Experiments on Heat from chemical Combinations (Experiments 

 Nos. 100, 100 a, 101, 102 105, 107, 108, 109, 114), consisting solely of the apparatus marked f 'n 

 No. 54,967 I 0. 3. 



54,968. Accessories for Experiments on Thermal Effects of the Electric Current, F i i 

 to 136 



;ure (Experiments Nos. 110 

 'rice (subject to fluctuation) 



For showing that heating is proportional to the length of the conductor, that it is proportional 

 to the square of the current density, that it is independent of the specific resistance and thickness 

 of conductor, demonstration and propagation of electric current lines, heat on decomposition of water, 

 heat during electrical work, heating of wires by a discharge impulse, heat of the induction current, 

 heating in a Hittorf Tube and in a thermocouple, formation of ozone by electric sparks. 



f2 platinum wire Spirals 15 and 30 cm long resp., 



0.2 mm thick. 



f2 parrs adjustable Copper Electrodes (Fig. 40). 

 2 further platinum wire Spirals 15 cm long, with 



plugs, 0.2 mm thick. 

 2 platinum wires in glass bulbs, single and double 



wire-lengths. 



1 Silver Wire and 1 Copper Wire 15 cm long, with 

 plugs. 



1 platinum Wire of double thickness, 15 cm long, 



0.4 mm diameter with plugs. 



2 small Boards with tinfoil slabs, 2 connecting 



blocks, and some sheets tinfoil. 

 2 small Hemispheres. 

 2 pair platinum Electrodes. 



1 Stopper with accumulator plates, size of 

 3,5 x9 cm. 



1 large Capsule for above. 



2 platinum Wires of 2.5 and 1.5 ohm respectively. 



1 pair Copper Electrodes. 



2 small zinc-carbon Electrodes. 

 1 small electric Motor. 



1 rubber Bung with manometer and 3-way cock, 

 also with 2 platinum electrodes 1 sq. cm. 



1 large Capsule for. above. 



f 1 Riess Bulb with tube attachment. 



2 Glass Bulbs with thermocouples. 



1 rubber Bung with thick copper wires and eye 

 for potassium iodide starch-paste paper, after 

 Liidke (Fig. 45). 



1 Wood Box for containing preceding parts, see 

 Fig. 54,968. 



Batteries of Accumulators with pachytrope for connecting the cells singly and in parallel: see Nos. 60,946/93. 



Influence Machines, Leyden Jar Batteries, Measuring Flasks, spark-drawing Devices, Induction Coils, Hittorf 

 Tube: see "Electricity" Section. 



54,968a. Small Collection of Accessories for Experiments on Thermal Effects of the Electric Current (Experiment* 

 Nos. 116, 117, 118, 1 119, 120, 121), comprising solely the items marked f in No. 54,968 



Cl. 6199. 



8. 5. 



0. 16. 

 38 



