240 Proceedings of Royal Soeiety of Edinburgh. [june 6, 
that he had just received a letter from Professor Amagat of Lyons, 
containing an account of the solidification of tetrachloride of 
carbon 6 p. 79° C., C 2 C1 4 [CC1 4 ] by pressure only at ordinary tempera- 
tures. 
Monday , Qth June 1887. 
J01IX MU EE AY, Ph.D., Vice-President, in the Chair. 
The following Communications were read: — 
1. On a Furnace capable of melting Nickel and Cobalt. By 
J. B. Eeadman, Esq. 
2. On the Fossil Flora of the Eadstock Series of the Somer- 
set and Bristol Coal Fields. Concluding Part. By 
E. Kidston, Esq. 
3. On the Discharge of Albumen from the Kidneys of 
Healthy People. By Prof. Grainger Stewart, M.D. 
Great diversity of opinion exists as to the frequency of the oc- 
currence of albuminuria in healthy people, and elaborate inquiries 
have led different observers to conspicuously contradictory con- 
clusions. Posner has said that his observations satisfy him that 
traces of albumen exist in every normal urine, and may be demon- 
strated if sufficiently delicate methods are employed. One of the 
most distinguished authorities on the subject, Dr Senator of Berlin, 
says that his observations supply good reason why he should con- 
sider it not improbable that, if we were to examine the urine for 
long periods at different hours of the day, and with great care, we 
should sooner or later find it to contain albumen in the case of every 
healthy man. Dr Kleudgen, in the course of a special study of 
albuminuria in relation to epilepsy, came to the conclusion that 
traces of albumen could be demonstrated in any urine above a 
certain degree of concentration. Dr de la Celle de Chateaubourg 
found albumen in the urine of 592 out of 701 healthy people whom 
