598 



Thermoscopy. 



N... :,4996 



54 996. > : 7. 



54 997. 1 : 7. 



54998. 1:10. 



54,996. Accessories for Experiments on the Heating Effect of the electric Current (Experiments Nos. 17 23), 

 Figure 



(a) 1 tubular Receiver with a constantan wire 100 mm long (Fig. 13, 0.4.0); (b) 2 tubular 

 Receivers each with constantan wire 200 mm long (Figs. 13 and 15, 0.9.0); (c) 1 Series Resistance 

 with a constantan wire 200 mm long (Fig. 15, 0.4.0); (d) 1 Closed Circuit Fall Trough No. 51,729 

 (Fig. 14, 1.6.0); (e) 2 Constantan Wire Spirals with cork mount, contained in reagent glasses 

 (Fig. 16, 0.5.0); (f) 2 tubular Receivers each with 2 constantan wires (0. 9. 0); (g) 1 tubular Recei\ IT 

 with three wires of copper, iron, and constantan (Fig. 18, 0.5.0); (h) 1 tubular Receiver with three 

 wires of different diameter (Fig. 19, 0.5.0); (i) 1 Lamp Resistance with three 110 volt Glow lamps 

 ( 0.16.0); (j) Double Conductor 2 m long with screw plug and plug contact and simple connecting 

 lead 40 cm long ( 0. 5. 0); (k) 2 pair Copper and Zinc Rods in cork mount (Fig. 20, 0. 4. 0); (1) 2 tu- 

 bular Receivers with double rods of antimony and bismuth (Fig. 21, 0.18.0). 



If the network voltage is other than 110 volts kindly quote pie-sure when ordering, 

 double-walled Receivers No. 54,994 a are also used. 



The two 



54,997. Accessories for Experiments on Gas Osmose (Experiments Nos. 24 and 25), Figure 



1 Porous Pot with rubber stopper and glass tube and a gla-s beaUer (Figs. 22 and 23). 



54.99S. Accessories for Manometric Experiments, F i g u r e (Experiments Nos. 2*>. 27. 20. 3D). Action <>i 



l)ubrol'ski Aspirator. Itoflection of Sound Waves after Trussevitch- Rostov/eft'. Absorption of 

 through a rotating body carries air with it 



(a) 1 Vaporiser as aspirator (Fig. 24, 0.2.0); (b) 1 Kiunlt Manometer in a Trusscvitcli Mop- 

 cock arrangement, No. 53,1!U, with sound horn and with pointer for direction of air current, on stand 

 (Figs. 25 and 32, ' 1.0.0); (c) 1 tuned Pipe on Maud (Fius. :>.-, and 32. 0.12.0): (d) 1 Absorption 

 Vessel, consisting of two tall cylinders, one spring wire net and one irhiss plate ( 0.10.0); (e) I pair 

 Wire Net Tongs (Fig. 34, 0.4.0); (f) 1 Pasteboard Cylinder with bottom, for fixing on the \Vbirlinir 

 Table ( 0.2.0). In addition, spherical concave Mirror No. 54,983 a is used for I-', xperimenl No. L'7 

 and one black-polished l!ecei\er No. 54.976)) for Experiment. No. 30. 



Boxes and Stands for Inking the in<li\ idual parts arc constructed it' desired and dialled at 

 lowest possible rate. It is requested that the collections o!' accessories thai are to In- 

 fitted in boxes or on stands should be stated. 



Speaking generally, it i- advisable to provide a -eparate box for eacli of the collection.- listed under 

 a separate List No.; only the smaller collections are combined with the larger. The boxes and stand- 

 are made of wood or pasteboard. 



cl. 173, 

 Bin, 6167. 



s. d. 

 5. 10. 



d. .V n 



2. In. u 



