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POPULAR SCIENCE REVIEW. 
taking it; the iodide of potassium given in doses of forty grains per diem 
appears four hours after ingestion, and continues to be eliminated for eleven 
days. 4. Arsenic appears in the milk at the end of seventeen hours, and its eli- 
mination had not ceased after sixty hours, 5. Though one of the most insoluble 
preparations, the oxide of zinc is nevertheless eliminated by the milk, and it is 
probable that this is also the case with the other preparations of zinc; fif- 
teen grains of oxide of zinc were found in the milk at the end of from four 
to eight hours, and it disappears sooner than iron, because no trace of it could 
be discovered after fifteen or sixteen hours. 6. The elimination of antimony is 
an undeniable fact, and it is well to bear this in mind during the period of 
nursing ; the same holds true in regard to mercurial preparations. 7, That 
alcohol and the narcotics are eliminated by the milk has not been demon- 
strated. Sulphate of quinine is eliminated very easily ; a child suffering 
from intermittent fever was cured by administering quinine to the nurse. 
METALLURGY, MINERALOGY, AND MINING. 
A Mineralogical Society is likely to be formed in London, and it is un- 
doubtedly required. Mr. J. H. Collins, who is engaged in furthering the plans 
of this project, has written the following letter to the “ Geological Magazine” 
(Nov. 1875). Dating from 57 Lemon Street, Truro, he observes : " An effort is 
being made for the establishment of a Mineralogical Society of Great Britain 
and Ireland.” The objects of the Society are — 
To simplify mineralogical nomenclature. 
To determine and define doubtful mineral species. 
To study the par agenesis of minerals. 
To record instances and modes of pseudomorphism, with their accompany- 
ing phenomena. 
To measure, determine, and illustrate forms of crystallization, especially 
the irregularities and peculiarities of particular planes, or of crystals from 
particular localities. 
To discuss systems of classification, and to establish a natural system. 
To collect, record, and digest facts and statistics relating to economic 
mineralogy. 
To promote the exchange of specimens ; and, generally, 
To advance the science of mineralogy. 
The rules and regulations to be ultimately adopted will be decided upon 
by the votes of probably the first 100 members. 
Graphite from Siberia. — M. S. Kern, of St. Petersburg, writes to the 
il Chemical News ” (Nov. 12, 1875) as follows : — 
Having lately analysed two samples of Siberian graphite from the Stepa- 
novsky Mine, I think the results of analyses may be of some use. The 
Zeilon graphite containing 80 per cent, carbon, and coming from England to 
Russia, is far richer and cleaner, and mixed with Russian graphite is used 
for the manufacture of black-lead crucibles. 
