L894.J 



Presents. 



159 



1. That over such temperature ranges as the observations extend 

 ic results obtained at a particular value of the slope may be 

 egarded as general for all liquids, with, the exception of the alcohols, 



for which the relationships vary slightly as the slope alters. A 

 general expression connecting the viscosity coefficient with the slope 

 is given. 



2. It is further indicated, from comparisons made by the use of 

 lopes which varied from liquid to liquid, and which were chosen 

 iccording to definite systems, that in the present state of the question 



(ual slope is the most suitable condition at which to compare the 

 riscosities of different liquids. 



With respect to the relationships existing between the magnitudes 

 the comparable temperatures of equal slope, it appears : 



1. That these vary in a regular way with the chemical nature of 

 the substances, except in the case of liquids like benzene and propylene 

 libromide, giving viscosity .curves which are abnormal when com- 

 3ared with those of their homologues. 



2. The temperature relationships may also be regarded as general 

 md thus independent of the value of the slope, except in the case of 



le alcohols, which, in this respect, as in that of viscosity at equal 

 lope, are anomalous. 



The rest of the memoir is concerned with the discussion of certain 

 jneral conclusions regarding physicochemical comparisons ; and it 

 inally deals with other possible methods of obtaining and comparing 

 viscosity magnitudes. 



Presents, February 22, 1894. 

 transactions. 

 Adelaide : Royal Society of South Australia. Transactions. 



Vol. XVII. Part. 2. 8vo. Adelaide 1893. The Society. 



Berlin: Gresellschaft fur Erdkunde. Verhandlungen. Bd. XX. 



Nos. 810. 8vo. Berlin 1893. The Society. 



Brisbane : Royal Society of Queensland. Proceedings. Vol. VI. 



Part 1. Vol. VII. Parts 12. Vol. VIII. Parts 14. 



8vo. Brisbane 1889-92. The Society. 



Calcutta : Asiatic Society of Bengal. Journal. Vol. LXII. Part 1. 



No. 3. Part 2. No. 3. Part 3. Nos. 13. 8vo. Calcutta 



1893 ; Proceedings. 1893. Nos. 89. 8vo. Calcutta 1893. 



The Society. 

 Edinburgh: Royal Society of Edinburgh. Transactions. Vol. 



XXXVII. Part 2. 4to. Edinburgh 1893; Proceedings. 



Vol. XX. Pp. 97160. 8vo. Edinburgh 1893; List of 



Members. 1893. 4to. The Society. 



