368 



Equilibrium of Gases. 



No. >2 720- 



52 730. 1 : 6. 



52 734. 1 : 8. 



52 733. 1 : 10. 



52 735. 1 : 6. 



52.720. Further Constituents of Apparatus for Experimental Measurements with Air Balloons, 

 see Fig. 52,718 



4 rubber balloons; 1 piece thin walled rubber tubing; 1 rubber ball; 1 glass tube in stopper; 

 2 glass stoppers; 2 distance pieces; 2 pieces chain and 1 rule. 



52.721. Clamping Stand, of wood, with iron base (Retort Holder), see No. 51,110 



Collodion Balloons. 



List No. 

 Diameter cm 

 Each 



52,722 



52,723 



11 

 0.1.0 



52,726 



35 

 0.3.0 



52,724 52,725 



18 22 



0.0.9 0.1.0 0.1.7 0.2.0 



Hydrogen Generating Apparatus: see under Nos. 51,278 51,284, p. 213. 



52,737. Hollow Cylinder, of pasteboard, for Air Balloon Experiments, after Friedr. C. G. Miiller 

 (M. T., Fig. 105a) 



52.452. Apparatus for showing the uniform Propagation of Pressure of Gases: see Figure 52,452, 

 p. 335 



52.453. - - idem, on stand and with stopcock: see Fig. 52,453, p. 335 



52.730. Pressure Level, after Tb'pler, Figure, for measuring small pressure-differences 

 (W. D., Fig. 141 [187]) 



52.731. idem, after Friedr. C. G. Miiller (M. T., Fig. 67), with T-shaped horizontal 



tube, with 2-colour centimetre graduation 



~ii'.732. -- idem, after (Irimsehl, with air bubble in horizontal tube (Ztselir. t'. d. plivs. 

 u. chem. U. 18, 1905, p. 199, Fig. 2) .' . 



52,733. Pressure Gauge Apparatus, Figure (W. D., Fig. 138 [126]), for comparing the 



S. (1. 



!t. 



0. 5. 



