( 1200 ) 
The influence of the Aw is often stronger than normal, for the 
observations we made, with chronic nephritis. Nor need this fact 
remain unexplained, for we may admit that a contracted artery — 
hard pulse of the nephritici — will offer a greater resistance to the 
compression than a normal artery. 
It is remarkable that after these observations we found a report 
of an article of Janeway (Lancet March 1911) in which this investigator 
also comes to the conclusion that with arteriosclerosis the arterial 
wall has little influence on the determination of the blood-pressure, 
a contracted arterial wall on the contrary has great influence! 
To be short, we are convinced that our method procures reliable 
information about MBp and mBp, and gives an impression of the 
factor of the Av. 
In order to determine averages of the Bp with normal men of 
different ages and with various diseases sull more determinations 
must be made. 
The same is necessary if we wish to compare the results obtained 
with the narrow ‘and the broad compression-armlet. Though it seems 
to us that higher figures are obtained with the narrow armlet, we 
have not yet made a sufficient number of comparative determinations 
to express a decided opinion on this head. 
Microbiology. — ‘Lipase produced hy Microbes.” By N. Li. SOHNGEN. 
(Communicated by Prof. M. W. BEIJERINCK.) 
(Communicated in the meeting of March 25, 1911). 
In a previous paper’) a number of fat-splitting bacteria were 
described which occur very generally in nature; at the same time 
the way was indicated by which these species may be distinguished 
from others and how they are brought into pure culture from the 
soil, sewage water, milk, or rancid butter. 
Among the yeasts and moulds, too, we meet many species that 
form lipase. Thus most yeasts contain endo-lipase; at abundant 
nutrition they are able to store up fat in the cell, and can use 
it again when less favorable culture conditions occur. 
Only a small number of yeast species secrete diffusing lipase ; to 
these belong some species often found in milk, among which a 
Torula. Fat-splitting yeasts may be obtained from garden soil by 
inoculation into a medium of the composition: 100 tap-water, 1 fat, 
1) These Proceedings XII, p. 667. 
