Tables 151-153. 



VISCOSITY. 



TABLE 151. — Solution of Alcohol in Water.* 

 Coefficients of viscosity, in C. G. S. units, for solution of alcohol in water. 



The following tables (152-153) contain the results of a number of experiments in the viscosity of mineral oils derived 

 from petroleum residues and used for lubncatmg purposes.? 



TABLE 152. —Mineral Oils.t 



931 

 921 



906 



921 

 917 



904 

 891 

 878 



855 



90s 



894 

 866 



4= C 

 R O 



°C. 



243 

 216 

 189 



163 

 132 



170 



151 

 108 



42 



i6s 



139 



90 



bO 



.E - 

 "2 5 

 3 ° 



°C. 



274 

 246 

 208 



190 

 168 



207 



182 



148 



45 



202 

 270 

 224 



Sp. viscosity. Water at 

 20^ C. = I. 



20° C. 



8.65 



4-77 

 2.94 

 1.65 



7.60 

 2.50 



50° C. 



11.30 

 7^31 

 3-45 



27.S0 



2.65 

 1.86 

 1.48 



3.10 

 3.60 

 1.50 



2.9 



2.5 



1-5 



2.8 

 2.6 



1-7 



1-5 

 1-3 



TABLE 153. — Mineral Oils. 



* This table was calculated from the table of fluidities piven bv Noack (Wied. Ann. vol. 27, p. 217). and shows a 

 maximum for a solution containing about 40 per cent of alcohol. A similar result was obtained for solutions of acetic 



t Table 152 is from a paper by Engler in Dingler's " Polv. Jour." vol. 268, p. 76, and Table 153 is from a paper by 

 Lamansky in the same journal, vol. 248, p. 29. The very mixed composition of these oils renders the viscosity a very 

 uncertain quantity, neither the density nor the flashing point being a good guide to viscosity. 



t The different groups in this table are from different residues. 



Smithsonian Tables. 



137 



