\-2 DENSITIES OF OXYGEN AND HYDRO(!EN 



Volume of globe No. i 9275.1 cc. 



Solid contents 443-° " 



Capacity at o'' S832. 1 " 



The capacities of the globes used in <leteiiiiiuing the density of oxygen are 

 siven in the f(i]li»\vinsr table: 



Number of globe. External volume. Solid contents. Capacity. 



1 9275- 1 cc. 4430 ce. 8832.1 cc. 



2 9229.6 " 435.7 " 8793.9 " 



3 20569-5 " 5 "-9 " 20057.6 " 



4 202iS6 9 " 474-2 " 19812.7 " 



5 22029.2 " 471.4 " 21557.8 " 



6 18340.3 " 444.7 " 178956 " 



7 15881.5 " 498.1 " 153834 " 



8 16949-7 " 4325 ' '6517.2 " 



9 i556'-2 " 479.5 " 15081.7 " 



The following table gives all the hydrostatic weighings of these globes with 

 the corresi)onding temperatures. All the weights are corrected for the weight of 

 air displaced by them, and the weights w liicli were used in water are connected for 

 the expansion of water and of brass to the temperature of the water in which they 

 were immersed. These con-ections are not v^ery large, and may be assumed to be 

 sufficiently well determined. If the other reductions need subsequent correction, 

 the data given are sufficient. 



It is, of course, obvious that my delermiuatious of the capacity of a globe are 

 not as accurate as they might have been made. By weighing the water contained 

 in a globe at the temperatuie of melting ice, Regnault determined the capacities of 

 the globes used by him in weighing known volumes of gases with a mean error of 

 one fortieth of a cubic centimetre.* But it is thought that the accuracy attained 

 is all that is necessary, especially .since it is nnu'li moiv than lliat nf other processes 

 on which the knowledge of the density of a gas depends. 



DATA CONCEKNING THE CAPACITY OF GLOBES. 



LOSS ON IMMKRSION. TKMI'ERATl'Kli. VOI.IME COMrUTEH. 



Grammes. Degrees. Cubic Centimetres. 



Globe 9266.21 17.87 9274.2 



I 9267.49 16.84 9274.0 



9266.81 17.24 9273.8 



9266.97 17.12 9-'73-8 



9267.08 17.05 92738 



9267.07 17.06 92738 



9269.02 15.57 92738 



442.77 16.58 443.1 



442.64 16.60 443.0 

 442.69 16.78 443.0 



442.65 16.83 443.0 

 442.67 16.95 443.0 



* Mendeleef, Anna/s of the Bureau of ll'eig/iis and Measures, St. Petersburg, Part I., 59. 



