No. 55047. 



LeidenJrost's Experiment. Dalton's Law. 



603 



55 041. 1 : 5. 



55 042. 1 : 2. 



JJdw* 



55040. 1:14. 



55 043. I : 6. 



55 044. 1 



55047. 1 : 1C. 



51', 753. 3 Barometer Tubes as No. 52,752, the tubes having etched graduation, with funnel- s - <i- 

 aperture and half-pierced stopcocks on the upper end, for conveniently introducing the 

 liquids to be evaporated "2. 0. 



52,653. Piezometer inset with two gas pressure tubes, after Despretz, for comparing the dif- 

 ferent tension of two gases at different pressures (different compressibility) 1. 0.0 



55.042. Apparatus after Gay-Lussac, Figure, for proving Dalton's Law on the ratio of 

 tension in gas-filled spaces and in vacuo (M. P. Ill, Fig. 267 [II, 2, Fig. 134]), with 



glass stopcock 0. 4. 



55.043. Dalton's Law Apparatus, Figure 0. 5. 



Ether or the like should be introduced drop by drop into the flask through the funnel. The 

 gla^s tube passing through the second hole in the bung is connected up to an open manometer. 



55.044. Dalton's Law Apparatus after Frick, Figure (M. P. Ill, Fig. 269 [II, 2, Fig. 136]) 0. 6. 



55.045. Apparatus for Measuring the Vapour Tension in an air-filled Space by means of Ether, 



Figure (W. 1)., Fig. 361 [34T 



0. 10. 



55,046. Apparatus for Measuring the Tension of Water Vapour in a non-vacuous space (W. D., 



Fig. 362 [342]), of glass, with rubber tubing 0. 10. 



55,047. 



idem, on stand, Figure 1. 2. 



( 1. 1790,1791,1795, 

 1789,5797, 1787, 179R. 



