Tables 236-238 



TABLE 236. — Effect of Pressure on Melting Point 



253 



Substance. 



Hg 



K 



Na 



Bi. 



Sn. 



Bi. 



Cd 



Pb 



Melting point 

 at 1 kg/sq. cm 



-38 

 59 

 97 

 271 

 231 

 270 

 320 

 327 



Highest 



experimental 



pressure: 



kg/sq. cm 



12,000 

 2,800 

 I 2 ,000 

 12,000 

 2,000 

 2,000 

 2,000 

 2,000 



dt/dp 

 at 1 kg/sq. cm 



0.005 1 1 

 O.O136 



o . 00860 



-O.OO342 

 O.OO317 



-O.OO344 

 o . 00609 



O.OO777 



At (observed) 



for 

 1000 kg/sq. cm 



5 

 13 



+ 12 



-3 

 3 



-3 

 6 



7 



Reference 



* A t (observed) for 10,000 kg/sq. cm is 50.8 . 



t Na melts at 177.5 at 12,000 kg/cm 2 ; K at 179. 6°; Bi at 218. 3 ; Pb at 644 . Luckey 

 obtains melting point for tungsten as follows: 1 atme, 3623 K; 8, 3594; 18, 3572; 28, 3564. 

 Phys. Rev. 191 7. 



References: (1) P. W. Bridgman, Proc. Am. Acad. 47, pp. 391-96, 416-19, 191 1; (2) G. 

 Tammann, Kristallisieren und Schmelzen, Leipzig, 1903, pp. 98-99; (3) J. Johnston and 

 L. H. Adams, Am. J. Sci. 31, p. 516, 1911; (4) P. W. Bridgman, Phys. Rev. 6, 1, 1915. 



A large number of organic substances, selected on account of their low melting points, have 

 also been investigated: by Tammann, loc. cit.; G. A. Hulett, Z. physik. Chem. 28, p. 629, 1899; 

 F. Korber, ibid., 82, p. 45, 1913; E. A. Block, ibid., 82, p. 403, 1913; Bridgman, Phys. Rev. 3, 

 126, 1914; Pr. Am. Acad. 51, 55, 1915; 51, 581, 1916; 52, 57, 1916; 52, 91, 1916. The results 

 for water are given in the following table. 



TABLE 237. — Effect of Pressure on Freezing Point of Water * 



P. W. Bridgman, Proc. Am. Acad. 47, pp. 441-558, 191 2. 

 t 1 atm. = 1.033 kg/sq. cm. 



TABLE 238. — Effect of Pressure on Boiling Point * 



* Greenwood, Pr. Roy. Soc, p. 483, 1910. 



Smithsonian Tables 



