NOVEMBER 19, 1897. ] 
and the ‘ neolithic ’ stations were the same, 
while the stratigraphic relations of the de- 
posits are inconclusive. 
ARCHMHOLOGICAL SURVEY OF OHIO. 
In a neat pamphlet of 110 pages, reprinted 
from Vol. V. of the Ohio State Archzeolog- 
ical and Historical Society, Mr. Warren K. 
Moorehead, Curator of the Society, gives a 
readable report of the field-work carried on 
in the Muskingum, Scioto and Ohio valleys 
during the year 1896." The exhibit is most 
creditable to his energy and judgment. 
The aim of his investigation is to produce 
areliable archeological map of the State, 
and also to examine critically some of the 
most remarkable ancient monuments and to 
collect the art remains of the former inhab- 
itants. In all these directions he has been 
quite successful. Nearly seven thousand 
monuments of the indigenous tribes have 
been located and mapped. A limited num- 
ber have been carefully excavated, and the 
total number of specimens obtained runs up 
into the tens of thousands. 
The report is illustrated with forty-five 
figures in the text of noteworthy mounds or 
valuable specimens, and much collateral in- 
formation relating to them isinserted. One 
prominent advantage has been the educa- 
tional influence of the survey on the popu- 
lation. Itis gratifying tolearn (p. 261) that 
there are now in Ohio 310 persons interested 
in its archeology! Can any other State 
equal this record ? 
D. G. Brinton. 
UNIVERSITY OF PENNSYLVANIA. 
NOTES ON INORGANIC CHEMISTRY. 
Prorerssor Motssan and Professor Dewar 
publish in the Comptes Rendus further 
experiments on liquid fluorin. The boiling 
point is —187°; at —210° it still remains 
liquid, showing no sign of solidification. 
The density was determined by suspending 
in it several different substances which 
SCIENCE. 
763 
are unacted upon; amber was found to 
rise and fall in the liquid, hence its 
specific gravity was 1.14. No absorption 
bands were found by the spectroscope, and 
between the poles of a powerful electro- 
magnet it showed no magnetic phenomena. 
Its capillarity is less than that of liquid 
oxygen and only one-sixth of that of water. 
At —210° it has no action on dry oxygen, 
water or mercury, but at this low tempera- 
ture it still reacts violently with hydrogen, 
and even with the hydrogen in oil of tur- 
pentine. The explosive substance which in 
previous experiments they obtained when 
fluorin was led into liquid oxygen is not 
formed if oxygen is perfectly dry, and ap- 
pears to be a hydrate of fluorin. 
In the Pharmaceutische Zeitung F. Sibbers, 
writing on the analysis of aluminum, claims 
that the proportion of silicon present is al- 
ways underestimated, from the fact that 
when aluminum is dissolved in acid a con- 
considerable part of the silicon is evolved 
as hydrogen silicid and lost. The average 
amount of silicon usually found in alumi- 
num is 0.3 %, but taking into consideration 
that which is lost in analysis the author 
considers that 0.6 % is usually present. 
As the presence of silicon is considered to 
be very detrimental to aluminum, these de- 
terminations of Sibbers deserve careful con- 
sideration. 
Dr. H. Carrineron Boiron, whose Bib- 
liographies of Chemistry and Scientific 
Periodicals have proved of so much value 
to chemists and other scientists, as well as 
to librarians, and who has done so much to 
throw light upon obscure points in the his- 
tory of chemistry, has again put American 
chemists under obligation to him by a paper 
on ‘Early American Chemical Societies,’ 
which was recently read before the Wash- 
ington Chemical Society, and now is re- 
printed from the Jowrnal of the American 
Chemical Society. It appears that before 
