436 





K. Tsuruta on 



the Heat 



of Vapc 



mzation 







A. , B. 



0. 



D. 



E. 



F. 



1. 



4 137-31 



38-89 



7-55 



18-18 



29-8 



2. 



9-25 | 118-96 



1 

 45-75 



7-90 



1505 



33-9 



3. 



13-8 103-50 



1 

 53-19 



8-35 



12-39 



37-75 



4. 



18-1 | 91-77 



1 

 61-17 



8-74 



10-50 



41-80 



5. 



22 81-19 



1 



70-06 



9-10 



8-92 



45-75 



6. 



26-75 , 69-69 



1 

 82-91 



9-50 



7-33 



51-00 



7. 



33-4 



55-75 



1 

 105-98 



10-12 



5-50 



58-85 



8. 



39-4 



44-85 



1 

 134-33 



10-68 



4-19 



66-95 



9. 



44-8 



3634 



1 



168-67 



11-96 



3-03 



75-20 



10. 



48 



31-33 



1 



197-60 



12-00 



2-61 



80-80 



11. 



49-4 



27-64 



1 

 22496 



12-92 



2-13 



84-75 



12. 



50-56 



25-70 





14-30 



1-79 



85-33 



13. 



! 51 



23-96 











The column A gives the temperature of the gas. 



The column B gives the volume of the saturated vapour at 

 point of liquefaction. 



The column C gives the fractional volume of the gas at 

 point of liquefaction in relation to the initial volume 

 under one atmospheric pressure. 



The column D gives the volume of the condensed liquid. 



The column E gives the ratio of the volume of the gas 

 to that of the liquid. 



The column F gives the pressure in atmospheres. 



These data alone are incomplete to enable us at once to 

 deduce by calculation the heat of vaporization in terms of 

 the usual units (metre and kilogramme). Here are given 

 only the relative volumes of the saturated vapour and con- 

 densed liquid, so that their specific volumes at different tem- 

 peratures, which are wanted, are unknown. It will, however, 

 be enough for our purpose if we know their densities. Now, 

 Ansdell gave as results of independent measurements the 

 densities of the condensed liquid at different temperatures. 

 An interpolation formula, obtyined between those densities 





