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^ PROCEEDINGS OF THE ACADEMY OF 
Dr. Leidy called the attention of the members to some remains of a Camel 
in the collection recently obtained by Dr. Hayden, from the Niobrara River, 
Nebraska. He exhibited the back portion of the lower jaw of the animal, 
which contains the true molar teeth, and possesses a hook-like process on the 
posterior border, as in the recent Camel ; in comparison with which the ex- 
tinct species appears to have been about two-third sthe size. He also exhibited, 
from the same collection, the fragment of a lower jaw of a species of Wolf, 
larger than any heretofore described. 
Dr. Uhler exhibited specimens of crystallized lead, produced by withdrawing 
the fused interior of a cooling mass. The crystals were arranged upon rhombic 
bases. He also exhibited specimens of apparently fibrous or columnar lead, pro- 
duced by exposing a mass when on the point of fusion, to a sudden shock. He 
had failed to develop any appearance of fibrous or crystalline structure upon the 
sawn end of a specimen by etching. 
Prof. Booth remarked the resemblance of the crystals to the skeleton cha- 
racter seen in gold, from California and Australia. He thought the fibrous or 
columnar appearance not attributable to crystallization, the sides being of 
variable number, but due merely to cooling, or similar causes. He had ob- 
served a structure resembling this in pigs of Lake Superior copper, in nickel 
commercially pure, and in an alloy of nickel and copper. 
Mr. Aubrey H. Smith, referring to some figures from Siam, presented by him 
this evening, said the stone head was from the ruined city of Juthia; the bronze 
figure, apparently ancient, presented still existing characteristics of the people. 
January l^tli, 
Vice-President Bridges in the Chair. 
Forty-five memlbers present. 
Dr. Ruschenberger read the following : — 
Hall of the Academy, January 26th, 1858. 
Report of the Committee of the Academy^ appointed to confer with a committee of the 
Biological Society^ on a proposed junction of the two Societies. 
Your Committee " appointed to confer with the Committee of the Biological 
Society of Philadelphia, with respect to the union of labors proposed in the 
letter of said Committee, and to report to the Academy the terms of the pro- 
posal, and also the reasons which shall appear to the Committee for or against 
such union," has frequently met the Committee of the Biological Society of 
Philadelphia, and, after free and full discussion of all the points involved, re- 
ports as follows : 
The third section of the Charter of the Academy provides, that " the Society 
shall consist of members and correspondents," and indicates that they shall be 
elected individually, each being balloted for, separately. The practice of the 
Society since its institution in the year 1812 has been in conformity to this 
provision. 
For this reason your Committee is of opinion that the Academy cannot, 
consistently with the spirit if not the letter of its Charter and By-Laws, accept 
any terms of union with the Biological Society, or annex any other society, or 
absorb any other body of men associated for analogous or identical objects, 
whatever might be the advantages of such union. 
Your Committee might, under a literal construction of the resolution by 
which it was created, properly conclude this report with a recommendation 
that the proposition to unite the two societies be rejected. But sensible of the 
meritorious objects of the Biological Society, it begs the indulgence of the 
[Jan. 
