360 BOTANICAL GAZETTE [MAY 
It is pointed out that the white pine is delimited by conditions of humid and 
cold atmospheres such as are found in northern latitudes and high altitudes. 
Its distribution is perhaps more dependent on humidity than on temperature, 
or rather on a low transpiration factor, that is, such a relation of heat and 
moisture, both at the foot and at the top, that the thin foliage can readily per- 
form its function. 
Besides the distribution of the white pine, the monograph treats of the 
white pine lumber industry, the original stand and present supplies, the mor- 
phological characters, the seed and seed supply, the structure and develop- 
ment of the wood, the growth and development in open stand and in the forest, 
growth in volume, the yield of white pine, and dangers and diseases. Contri- 
butions by two specialists on insect enemies and wood of the white pine add 
to the economic interest. The appendix, which comprises more than half the 
monograph, consists of seven sets of tables of measurements, and a careful 
explanation of the forms used in the investigations—H. N. WHITFORD. 
MINOR NOTICES. 
AMONG THOSE who have taken advantage of the offer of the Division of 
Forestry to make a personal study of areas which offer favorable opportuni- 
ties to illustrate forest management are the owners of two large tracts of 
land in the Adirondacks. The results of the investigation are embodied in a 
recent bulletin of the Department. The author makes a plea for an Ameri- 
can system of forestry. He discusses six measures of prime importance for 
the proper care of the European forest, though they would be exceedingly 
impracticable if applied to the plots under consideration, and then proceeds 
to propose a simple system of management that will enable the owner ad 
make a profit from the land and at the same time secure the permanence of 
the forest. 
Among the features of great interest to the ecologist is the special con 
sideration of the spruce. Under this head the habits of the spruce, the influ- 
ence of situation and soil on its character and distribution, its tolerance of 
shade, and its reproduction are discussed in a clear and scientific mannet: 
Another valuable feature is the presence of a large number of illustrations, 
mainly from photographs, and of two contour maps of the regions described. 
— WHITFORD. 
Dr. C. F. MILLspauGH has issued as Vol. II, no. 1, of the Botanical 
Series of the Field Columbian Museum the first part of his P/anfae Utowanae, 
being a catalogue of the species. The plants were collected between Decem>- 
ber 1898 and March 1899 in Bermuda, Puerto Rico, St. Thomas, Culebras, 
Santo Domingo, Jamaica, Cuba, The Caymans, Cozumel, Yucatan, and the 
5 6, 
*Graves, Henry S.: Practical forestry in the Adirondacks. Bulletin no, 2 
U. S. Department of Agriculture, Division of Forestry. 
