52 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



expect from the small number of dilatation measurements. These 

 values are shown in Table VU. When plotted, they show consider- 

 able discrepancies. The value at —5° of Nadejdine and that of 

 Pagliani are almost certainly in error. The other points lie roughly 



TABLE VII. 



Cp FOR ISOBtJTYL AlCOHOL. 



on a straight line, such that Cp increases from about 15 at 0° to about 

 23 at 50°. This is a very considerable increase. 



Amyl Alcohol. — Experiments were made on this with three fillings 

 of the apparatus; the first for compressibility and dilatation at low 

 pressures with the large bulb, the second for compressibility and 

 dilatation over the high pressure range, and the third for compressi- 

 bility and dilatation over both ranges, high and low. The runs were 

 all accomplished without accident of any sort. 



The average discrepancy of the piston displacement for compressi- 

 bility at 40° Avas 0.0019 inch on about 2 inches. The corresponding 

 discrepancy for changes of temperature of 20° at constant pressure 

 was 0.00206 inch on an mean of about 0.070 inch. 



26 Louguinine, 1. c. 



27 Nadejdine, 1. c. 



28 De Heen and Deruyts, 1. c. 



29 Pagliani, 1. c. 



