Passing Isothermally from Solid to Liquid. 13 



15. Specific heat and density. — In a series of experiments 

 described elsewhere* and considerably extended since, I found 

 for solid thymol (if c and p denote specific heat, density, and 

 temperature, respectively.) 



e = *811 (1 + -00302(9), 



l/p— -9631/(1 — (-0002456 + 20)0) 



and for liquid thymol 



c=-447 (1 + -002380) 



l/p= 1-00113/(1 — (-0007600 + 20))0 



Hence with sufficient accuracy for the present data the tem- 

 perature factor of cp for the solid was put (i + -00280), and for 

 the liquid (1 + '00160). In computing the correction factor in 

 equation (7), §10, h Y was therefore referred to surface tempera- 

 tures of the upper plate, while the other quantities p 1 c, q, 

 obtain for the mean temperature of the charge. 



Table 3. 



Heat condition of solid thymol. A : 



— -1070 cm ; I, 



Low temperature 







environment, f 









Ml tO Us 



St 1 4 x 6 log 



u Mean 9 



U d 



t m x 10 3 kx 10 6 



°C. 







°Q. 



°c. °c. 



°C; 



g/cs 



24-8-19-7 



5 m s_ 6 m s 



5,20-6,20 

 5,40-6,40 



805 



822 

 822 



14-1 



27-8 [5-9 

 28-7 j 



6-2 



961 356 



18-8-15-4 



7,0 -8, 

 7,20-8,20 

 7,40-8,40 



825 

 821 

 820 



11-6 



— 5-9 



6-2 



963 356 



14-8-12-4 



9, 0-10,0 



9,20-10,20 



9,40-10,40 



817 

 811 

 815 



9-8 



— 5-9 



6-2 



965 354 



12-0-10-1 



11,0-12,0 



11,20-12,20 



11,40-12,40 



810 

 812 



827 



8-6 



— 5-9 



6-2 



966 355 



A = 



:-1070 cm ; 



i7, High temperati 



are environment. 4 : 





23-7-19-1 



3 m ,0 s -4 ,n , s 



3,20-4,20 



3,40-4,40 



780 

 785 

 790 



13-6 



27-8 | 5-9 

 27-8 j 



28-5 



1019 360 



18-3-15-1 



5, 0-6, 

 5,20-6,20 

 5,40-6,40 



772 

 - 768 



773 



11-8 



— 5-9 



28-5 



1043 360 



14-6-12-4 



7, 0-8, 

 7,20-8,20 

 7,40-8,40 



74.7 

 755 

 743 



9-7 



— 5-9 



28-5 



1075 361 



12-1-10-6 



9, 0-10, 

 9,20-10,20 

 9,40-10,40 



723 



71 : 

 709 



8-6 



— 5-9 



28-5 



1120 360 



* Proceed. Am. Acad., xxvi, p. 313, 1892. f Plate E suddenly cooled at 4 m s . 

 \ Plate E suddenly cooled at 2 m s . 



