89() - Monthly Microscopical 
( — ) Journal, Dec. 1, 1870. 
NOTES AND MEMORANDA. 
Mr. Browning’s Spectroscope Tables—Mr. John Browning has 
after considerable difficulties succeeded in preparing a number of 
tables of spectroscopic spectra at an exceedingly low price, and which 
cannot fail to be of immense value in working with the spectroscope. 
Each table is about the size of one of the plates in this Journal, and 
contains no less than seven spectral bands, each measuring nearly 
three inches across. At the top of the plate are indicated the prin- 
cipal lines in the band by means of the well-known letters; and the 
plates are so constructed that either a pen or a pencil may be used to 
mark down the bands obtained by experiment. The price we believe 
is extremely low. 
Examination of Fibres in Mixed Fabrics.—In the ‘ Chemical 
News’ of October 7th, Mr. John Spiller gives a long account of the 
various chemical processes used for the purpose of helping one to dis- 
connect the various forms of fibres. It is essentially a paper dealing 
with the chemical tests. For the microscopical methods le refers to 
Mr. Suffolk’s recent treatise. 
Vitality of Beer-yeast and Vaccine Lymph.—M. Melsens, who 
has contributed a memoir on the above subject to the ‘ Bulletin de 
lV’ Académie Royale des Sciences de Belgique,’ No. 7, 1870, says that, 
as regards beer-yeast, his former experiments have been confirmed. 
With regard to the vaccine lymph, he found that it maintained its 
vitality even when exposed to cold, artificially produced, of 80°. 
Diseased Milk.—In cattle which are infected by the foot-and- 
mouth disease, it seems that the milk rapidly becomes infected by 
microscopic fungi. The ‘Medical Press and Circular,’ which has a 
note on the subject in its issue of September 21st, gives the following 
facts :—In one farmer’s house every member of the family suffered 
from parasitic thrush ; they were consuming milk from diseased cattle, 
and the medical attendant ascribed the existence of oidium albicans to 
some materies morbi existing in the milk, for when the use of it was 
discontinued the mucous surfaces affected speedily recovered their 
normal state. So it has been noticed by others that when suspected 
milk was used and aphthe were produced, that a discontinuance of 
the milk soon permitted the disease to yield to simple treatment. 
American Association for the Advancement of Science.—This 
Association closed its nineteenth meeting on the 25th of August, 
at Troy, New York. Owing to the illness of President William 
Chauvenet, of St. Louis, the Vice-President, Dr. T. Sterry Hunt, of 
Montreal, presided. The meeting was largely attended, there being 
about three hundred names enrolled on the Treasurer’s books. The 
next meeting is to be held in Indianapolis, and the meeting in 1872 
will probably be in San Francisco, upon invitation of the California 
Academy of Sciences. The President-elect for the next meeting is 
