326 



TABLE 323.— VISCOSITY OF MISCELLANEOUS MOLTEN OXIDES 



(Temperature variation) 

 Values given as log™ 77, where ij = viscosity in poises. 



1300°C 



12.06 



1.52 

 1.48 



5.82 

 6.04 



4.60 

 5.25 

 7.0 



2.32 



6.2 

 1.78 

 .911 



1600°C 



.387 

 .079 

 .146 

 .053 



1.40 

 .549 



119 Birch, Handbook of physical constants, 1942. Measurements by: Volarovich and Leontieva, Trans. 

 Soc. Glass Techn., vol. 20, p. 139, 1936. McCaffery, Trans. Amer. Inst. Min. and Met. Eng., vol. 100, 



pp. 64, 86, 122, 125, 1932. Bowen, Trans. Amer. Geophys. T'nion, pt. 1, p. 249, 1934. Kani, Proc. 

 Imp. Acad. (Tokyo), vol. 11, p. 334, 1935. Kani and Kuzu, Proc. Imp. Acad. (Tokyo), vol. 11, p. 383, 

 1935. 



TABLE 324.— VISCOSITY OF BORON TRIOXIDE 



(Temperature variation) 



120 Dane ana Birch, Journ. Appl. Phys., vol. 9, p. 669, 1938, have shown that for pressures not in 

 excess of 2000 kg/cm 2 the viscosity of boron trioxide is given for various pressures by the relation 

 ?-?o e"i>; and at 359°C, a= 15. 10—* cm 2 /kg, and at 516°C, a — 4.6 x 1C-* cm 2 /kg. Data from Birch, 

 Handbook of physical constants, 1942, and from unpublished measurements by H. R. Lillie. 



Observers of data by columns: 



* Arndt, Zeit. Elektrotechn., vol. 13, p. 578, 1907. 



t Parks and Spaght, Physics, vol. 6, p. 67, 1935. 



t Volarovich and Tolstoi, Trans. Soc. Glass Techn., vol. 18, p. 209, 1934. 



§ Volarovich and Fridman, Acta Phys. (U.S.S.R.), vol. 6, p. 393, 1937. 



jj Lillie, unpublished data. 



SMITHSONIAN PHYSICAL TABLES 



