( 767 ) 



The columns from A to H {H included), have the same meaning 

 as those of table X of Comm. N°. 78 6 . K denotes the position of 

 the liquid level above the boundary of the piezometer-reservoir and 

 the glass stem, derived from the indications of the float. 



From this the following table is obtained, which gives the cor- 

 rections of volume and pressure required for the calculation of [Wa ■ 

 It corresponds to table XI of Comm. N°. 78. 



The volumes of the parts of the glass capillary with their correc- 

 tions have been separately given. Moreover the corrections u\ and 

 h have been added, the former is a consequence of the packings 

 being pressed down at g x and g a , the latter accounts for the weight 

 of the compressed air in the connecting' tube between the manometer 

 and the piezometer. The vertical distance of the levels of the mercury 

 is about 0.5 meters. Instead of the mean coefficienl of expansion /•, 

 the double term l\ -j- k,t has been assumed (cf. § 8) for the 

 computation of the correction w x . 



Here we must point out that as standard temperature 4 for the 

 reduction of the parts into which the glass capillary is divided, 

 -|- 20° has been assumed, so that (lie differences t x — 1 3 are not very small 

 here. The method of interpolation applied in Comm. N°. 78 for 

 small values of 4 — 1 2 will be used as soon as we have tables 

 for cl XfH at our disposal. The values have been directly determined 

 here by calculation. 



