1889-90.] Dr H. H. Ashdown on Substances in Urine. 65 
He is, however, passing daily very large quantities of glycuronie 
acid in a urine which is not increased in quantity or density. 
It must not, however, he concluded from these results that the 
presence of this substance is so extremely rare, for my observations 
were made upon individuals who were believed to he free from 
diabetes mellitus, and since it causes no apparently inconvenient 
symptoms its presence may be more frequent than one might be 
led to suppose. 
Further, my having shunned all cases of acknowledged diabetes, 
I may have unconsciously rejected instances due to the presence 
of glycuronie acid in the urine which have been supposed to be 
glucose. It is not unlikely also that some cases of true glycosuria 
may have been present also in the urine glycuronie acid , in which 
case they will very effectually mask each other. 
The difficulties to be met with and overcome in order to demon- 
strate the presence of both substances in the same urine are ex- 
tremely great, and I may here state that the usual solutions of 
lead or baryta, which are recommended to be added to urine for 
the purposes of clarification before using the polariscope to estimate 
the quantity of sugar present, are not sufficient to eliminate all 
chances of fallacy in the event of glycuronie acid being present as 
well as glucose. 
The Volcanic Eruption at Bandaisan. By 
C. Michie Smith. (With a Plate.) 
(Read January 20, 1890.) 
The principal phenomena connected with the great volcanic 
eruption at Bandaisan, in Japan, have been described by Professor 
S. Sekiya and Mr Y. Kikuchi in their official report,* but certain 
features, especially with reference to the effects of erosion on the 
ejected materials, seem worthy of more detailed description. 
To make the account intelligible, it will be necessary to describe 
briefly the chief features of the eruption. The name Bandaisan is 
given to a group of peaks lying in lat. 37° 6' N. and long. 140° 6' 
* Trans. Seismological Society of Japan, 1889, and Journal of the College of 
Science, Imperial University, Japan, vol. iii. part ii. 
VOL. XVII. 1/4/90 
E 
