1896,] Albert Nelson Prentiss. 287 
which received the first Walker prize by the Boston Society 
of Natural History, and was published in pamphlet form (Uni- 
versity Press, Ithaca, N. Y., 1872). Minor contributions have 
been made to some of the American botanical journals. 
The most extended piece of botanical writing which Profes- 
sor Prentiss accomplished has unfortunately not yet been pub- 
lished. This was a monograph of the hemlock, Tsuga Can- 
adensis, for the Division of Forestry of the U. S. Department 
of Agriculture. The monograph was one of a series upon 
certain of our coniferous trees, prepared at the request of the 
chief of the Division of F orestry,’ Mr. B. E. Fernow, by dif- 
ferent authors. Professor V. M. Spalding made the mono- 
graph on the white pine, Dr. Chas. Mohr on the southern pines, 
Ir. Flint on Pinus resinosa, rigida, etc., and Professor Pren- 
tiss on the hemlock. According to certain financial require- 
when they were presented at the expiration of this limit, they 
Wee all necessarily short in observations of a kind which are 
Needed to formulate rules for forestry practice, especially 
measurements at various stages of development not only of 
Single trees but of groups inthe forest. For this reason none 
m these Monographs were printed at that time, and only now 
Sthe department in a position to publish Dr. Mohr’s mono- 
sph, to be followed by the others in turn. These mono- 
réphs included statistics of area and consumption, with a 
listory of the economic development of timber supplies; brief 
‘nel descriptions, including studies on wood — 
te *sy, the requirements of the species for its development, 
fa O8tess through various stages of growth, etc., etc. - 
“sor Prentiss’ monograph was among the best, and very we 
na together, but was, like the rest, deficient in the respects 
Tentioned, ; : 
in ~ fact that his productiveness has not raaniteated EEE 
cal i frequent and pretentious contributions gf vent 
ee may have seemed suprising to those who 2s ai 
labo ‘Stood the conditions under which Professor Prenti 
Mpenizae During the early history of the ip bao 
toa,” Of a department when funds were irene eae 
“ice build and equip suitable rooms for the latg 
1 - 
cig fetly indebted to the kindness of Mr. Fernow for these facts con 
Conifer monographs. G. F. A. 
