( 778 ) 
TABLE XVI. Hy at 20°.0 C. 
p | PvA Diff. S 
| Series 77. N93 { 47.837 | 4.4040 | —+ .0007 
4| 48,931 | 1402 | + 
5| 52.222 | 1.4067 | + 5 
6 | 56.372 | 4.1089 | — 0001 
12 | 56.432 | 1.4001 | + 1 
a 
13 | 56.447 4.4095 
The difference of these determinations from those of SCHALK WIJK 
is thus small and falls within the limits of our accuracy, so that 
we may assume with some confidence that our measurements on 
oxygen have the same accuracy. 
TABLE XVII. Hy at 0°.0 C. | 
= 
| 
| 
! 
| 
p ee aes 
et | 
| Series ZZ. N° 7 | 44.996 1 0293 
9} 49.376 | 1.0316 
8 | 49.492 | 1 0319 
14 | 53.203 | 41,0342 
om 53.249 | 1.0346 
§ 17. The standardization of the working manometer by the 
open and closed standards. In our measurements we do not require 
a manometer of quite the same accuracy as the standards but rather 
one of somewhat simple construction which can be more rapidly 
and easily read, yet the accuracy should be of at least the same 
degree as arranged for in the construction of the piezometers. 
As mentioned before in § 5, Comm. No 69 this accuracy has been 
obtained by a combination of the preliminary mercury calibration 
with many direct comparisons with the standard manometers at 
various points of the scale. 
