A])pendix Jl 



whereas the expedition reached altitudes at which coiisideral>ly lower pressures 

 had to 1)6 recorded ; hence, besides Albrecht's 34/' table the following was also 

 calculated, and is here itiserted, as it may be found useful in other cases. 



The value of log B, given in this table, is calculated with the formula: 



logB = log ({7-12407 - 10}//), 



in which li is the barometric pressure in millimetres. (1 nmi.= about .;,Lthinch.) 



308 



