CHAPTER IV. 



ON THE NUMBERS OF NUCLEI PRODUCED BY SHAKING DIFFERENT LIQUIDS AND 



ON ALLIED DATA. 



I. Explanation. — In my report on the nucleus, ' I showed that the number 

 produced in a given mode of comminution was least in pure water, greater in 

 dilute organic solutions, and still greater in diltite inorganic solutions, all of the 

 same strength. Results were also given for other solvents than water, in par- 

 ticular for benzol ; but I was unable to reduce the data to the same scale as for 

 aqueous solvents, as the data needed for the redtictions were not at hand. I 

 have since found that the method of Wilson and Thomson ^ lends itself to 

 benzol, and have therefore computed the data over again, as shown in table i. 



TABLE I.— NUMBERS OF NUCLEI PRODUCED BY VIGOROUSLY SHAKING DIF- 

 FERENT SOLUTIONS IN THE SAME MANNER. CONCENTRATION i %. 



2. Data. — The pressure reduction used to effect the condensations was 

 throughout dp = 16 cm. Hence at about 20° the adiabatic fall of temperature 

 in case of a benzol-air medium should be as far as - 10.2°, the rise of temperature 



' Smithsonian Contributions to Knowledge, No. 1373, Chap. V, 1903. 

 ' Phil. Mag. (s), XLVi, p. 538, 1898. 



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