n75 



with marks jiii( on tliem on llio IVoiil and the back of tho (nbo r/, 

 but above each oilier, in such a way Ihat the two marks are in the 

 same pLane with the needle. When a vapour pressure determination 

 was made, a copper bath with a molten mixture of KXO^ and 

 NaNO., was placed round the phosphorus manometer, in which a 

 stirrer was continually moved up and down. ') 



/T 



^=<i 



^ Q 



^ 



hJ 



1) In the preliminary experiments an air bath was used, witli which no accurate 

 determinations could be made, however, on account oi' the unequal temperature. 



