TRANSACTIONS OF SECTION B. 



603 



ML. 



As an example the results -with benzene are given. 

 6 is the critical temperature. 



Latent Heat of Benzene. 



is Trouton's formula ; 



* 94-4 Griffith and Marshall ; 93-45 SchifE. 



2. On some Derivatives of Fluorene. By Miss Ida Smedley. 



3. Action of Diastase on the Starch Granules of Raw and Malted Barley. 

 By Arthur R. Ling, F.I.C. 



The -whole of the published data referring to the hydrolysis of starch by 

 diastase have been derived from the study of the action of the enzyme on potato- 

 starch paste, and the application of these to practical purposes has led to mislead- 

 ing and erroneous conclusions. The starches of barley and other cereals differ from 

 that of the potato in being readily attacked by a solution of diastase in the ungela- 

 tinised condition. 



The author has carried out a series of mashes -nith barley and malt starch of 

 various origin, the starch being mixed with the diastase preparation in the dry 

 state and mashed -with water at different temperatures for two hours. 



The following table illustrates the results obtained : — 



* The symbol R denotes the percentage of apparent maltose, determined by the 

 capric reduction method, on the dissolved matter in solution. The symbols 

 [a]D 3-93 and R 393 indicate that the total solids have been calculated from the 

 specific gravity of the solution by the divisor 3-93, 



