102 



PROCEEDINGS OF THE AMERICAN ACADEMY 



.0036664 

 .0036670 

 .0036658 

 .0036664 

 .0036676 



Mean a = .00366664 



obtained by using the coefficient of expansion of glass .0000264 at 

 100°, or a = .0036698, using the coefficient .0000287. 



The thermometers Nos. 6163, 6165, 6166, were always taken out 

 of the bath when the temperature of 40° was reached, except on 

 November 14, when they remained in throughout the whole experi- 

 ment. 



The thermometer readings are reduced to volumes by the tables of 

 calibration. 



TABLE X. — 1st Series, Nov. 14, 1877. 



The first four series, Tables X. to XIII., were made with one bulb 

 to the air thermometer. A new bulb was now made, whose capacity 

 was 192.0 ccm -, that of the old being 201.98 ccn \ The value of y for 

 the new bulb was .0058. The values of h' and a were obtained as 

 follows : — 



This value of a is calculated with the old coefficient for glass. The 

 new would have eiven .0036717. 



