54 PROCEEDINGS OP THE AMERICAN ACADEMY 



The values thus found for the various coefficients were as 

 follows : — 



The faint line of Figure 2 shows the curve really represented by 

 the formula y =^ <}> (x). As every new coefficient requires, in gen- 

 eral, more work for its determination than those preceding, I at- 

 tempted no closer ap2:)roximation to the actual curve of the steam 

 temperatures than is shown in this diagram. 



