294 



K. Tsnruta on the Alleged Sign of 



because they are small in comparison with those on the gas- 

 line, and because the determinations of these latter volumes 

 will surely involve experimental errors perhaps not less than 



the former. The values of ( -^ ) were calculated from Biot's 



® 



formula given by the author just in the same manner as is 

 explained by Ramsay and Young. When we plot the values 



t. 



p. 



( d JL\. 

 U r J7 



s. 



v. 



-28°41 



cm. 

 3-625 



cm. 

 0-2412 



cm. 



5564-36 



cal. 

 104-53 



-21-22 



5-808 



0-3511 



3711-43 



104-47 



-12-66 



9-455 



0-5244 



2292-41 



99-66 



- 5-24 



14-005 



0-7209 



1581-36 



97-19 



+ 2-92 



21-003 



0-9908 



1076-54 



93-70 



+ 6-84 



25-125 



1-1426 



91797 



93-46 



+ 8-42 



27-003 



1-2080 



858-37 



92-91 



+ 10-68 



29-742 



1-3060 



784-55 



92-55 



4 14-04 



34-462 



1-4637 



684-17 



91-52 



+26-53 



56-865 



2-1588 



426-48 



87-81 



of v against temperature, we obtain points which, when we 

 omit those for + 2°"92 and — 21 0, 22, all lie fairly well in a 

 straight line — a relation which may be expressed by the 

 following formula : 



v=95-70 -0-3033. £. 



It is interesting to compare the values of v which may be 

 looked upon as due to Regnault, Ramsay and Young, and 

 Battelli*. They are given in the following table and repre- 

 sented in the annexed diagram. The first four columns are 

 taken from Ramsay and Young T s paper, p. 90. These numbers 

 are not so concordant as could be wished ; Regnault's are 

 rather irregular, and Ramsay and Young's differ a good deal 

 from, and are in general smaller than, Battelli's. 



Although according to Ramsay and Young's measurements 

 extending from 0° to + 190° the heat of vaporization v is not 

 a linear function of temperature, yet within the temperature 

 range under consideration we may assume it to be so with a 



* No notice was taken of A. Perot's measurements, Ann. de Chim. et 

 ~Phys. 6" ser. tome xiii. (1888), for the reason that the author shows his 

 numbers to be in close agreement with Regnault's. 



