410 
when administration duties compelled the lat- 
ter to relinquish his teaching. 
Brush also did much important work along 
the lines of the systematization of mineral- 
ogy. He wrote the eighth, ninth and tenth 
supplements to the 4th edition of Dana’s 
“System of Mineralogy.” He assisted in the 
preparation of the 5th edition of that book 
and wrote its first appendix. In 1874 he pub- 
lished his “ Determinative Mineralogy and 
Blowpipe Analysis,” a book which passed 
through fourteen editions until 1898 when it 
was revised by S. L. Penfield. 
He commenced to assemble a mineral col- 
lection when a boy of fifteen years of age. 
His first specimen, which is still preserved, 
was collected at Salisbury, Connecticut, in 
1846. This was the nucleus of what has since 
grown to be a collection of more than fifteen 
thousand specimens. The Brush Mineral Col- 
lection, as it is called, is in many ways 
unique. The idea that its founder always had 
in mind was to make it a collection for study 
rather than one for exhibition. It does not 
include, therefore, as many large or striking 
specimens as some of our public collections, 
but is, on the other hand, particularly rich in 
representative and type material. It is the 
repository of most of the minerals which have 
been the subject of investigation at Yale dur- 
ing the last forty years. From the viewpoint 
of the student of mineralogy, therefore, it 
ranks high among the mineral collections of 
the world: Together with a large mineralogical 
library it was given to the Sheffield Scientific 
School in 1904 accompanied with an endow- 
ment fund to provide for its future main- 
tenance. The Brush Mineral Collection will 
therefore always remain one of the treasures 
of Yale and form a notable monument to its 
founder. 
Professor Brush was elected a member of 
the National Academy of Sciences in 1868 
and received the degree of Doctor of Laws 
from Harvard University in 1886. He was 
president of the American Association for 
the Advancement of Science in 1880. He was 
an honorary member of the Mineralogical So- 
ciety of England, was a foreign member of 
SCIENCE 
[N.S. Vou. XXXV. No. 898 
the Geological Society of London, of the Geo- 
logical Society of Edinburgh, of the Royal 
Bavarian Academy of Sciences of Munich 
and various other learned societies, both at 
home and abroad. 
It is seldom that we have a man of such 
wide influence along so many different lines 
who can combine, as he did, the activities of 
the scientific investigator, the duties of the 
organizer and the services of the public- 
spirited citizen. His character, combining, 
as it did, the scientist’s demand for truth and 
accuracy with the kindly spirit of the broad- 
minded gentleman, was an inspiration to all 
who knew him. His optimism, his generous 
nature, and his readiness to serve were quali- 
ties that endeared him to his colleagues and 
to the many students with whom he came in 
personal contact. 
PUBLISHED WORKS OF GEORGE JARVIS BRUSH 
1849. ‘‘Analysis of Albite,’’ Amer. Jour. Sci., 
Vol. 8, p. 390. 
‘¢ Analyses of Indianite,’’ Amer. Jour. Sci., 
Vol. 8, p. 391. 
. ‘‘Determination of Water in the Anhydrous 
Prehnite of Whitney,’’? Amer. Jour. Sci., 
Vol. 10, p. 121. 
‘“Analyses of American Spodumene,’’ 
Amer. Jour. Sci., Vol. 10, p. 370. 
‘¢Bluor of Illinois,’’ Amer. Jour. Sct., Vol. 
14, p. 112. 
‘Reexamination of American Minerals’? 
(with J. Lawrence Smith), three papers, 
Amer. Jour. Sci., Vol. 15, p. 207, Vol. 16, 
p. 41 and p. 365. 
‘Chemical Composition of Clintonite,’’ 
Amer. Jour. Sci., Vol. 18, p. 407. 
‘«Test for Zirconia,’’ Amer. Jour. Sct., Vol. 
1852. 
1853. 
1854. 
18, p. 415. 
1855. ‘‘On Prosopite,’’? Amer. Jour. Sci., Vol. 20, 
p. 273. 
1857. ‘‘On Dechenite,’’? Amer. Jour. Sci., Vol. 24, 
p. 116. 
‘¢On Parathorite,’’ Amer. Jour. Sci., Vol. 
24, p. 124. 
‘On Antigorite,’’ Amer. Jour. Sct., Vol. 
24, p. 128. 
1858. ‘‘On Chalcodite,’’ Amer. Jour. Sci., Vol. 25, 
p. 198. 
‘¢Mineralogical Notices,’? Amer. Jour. Sci., 
Vol. 26, p. 64. 
