1903] CURRENT LITERATURE 471 
important American timber trees. This will be much appreciated by students 
of forestry.—H. N. WHITFORD. 
IN A VERY attractive volume Snow’? discusses the species and properties 
of a large number of native and foreign species of wood. A valuable feature 
of the book is the half-tone reproduction of photographs of trees, bark, and 
wood of many species, usually one plate for each genus that is treated. The 
work is an untechnical presentation of the subject. It would have been wise 
to substitute modern terms for “exogenous” and ‘‘endogenous”’ in the text. 
—H.N. WHITFORD 
NOTES FOR STUDENTS. 
SCHMIED reports® a carotin dissolved in oil inthe periderm of the roots 
of Dracaena reflexa, which is identical in many respects (not in all), with the 
carotin of Dancus. 
IN A WORKING PLAN for some forest lands in South Carolina Sherrard 9 
gives data eps the silvicultural habits of the southern pines in this 
state.— H. HI 
ae thinks the diminished flow of the Rock River is due to the 
deforestation of large tracts of land in its basin. Cultivated lands and wood 
lots have been largely converted to pasturage, thus interfering with waterflow. 
He advises a more careful treatment of the present forest and its enlarge- 
ment where it will not interfere with land more valuable for agricultural 
purposes.— H. N. WHITFORD 
CHARPENTIER™ finds that the green alga, Cystococcus humicola, grows 
luxuriantly in solutions, the air above which is lacking in CO,. The neces- 
Sary carbon in such cases may be taken from glucose. The green color may 
develop in the dark, though growth is less rapid in this condition, When 
required to depend upon atmospheric CO, as a source of carbon, the growth 
of Cystococcus is very slow.—H. C. CowLeEs. 
A REPORT of the Bureau of Forestry of the Philippine Islands * contains 
7Snow, H.C. The principal species of wood ; their characteristic properties. 8vo. 
pp. xi-++ 203. Als. 99. figs. g. New York: John Wiley & Son. 1903. $3.50 
ScHMIED, H., Ueber Carotin in den Wurzeln von Dracaena und anderen Liliaceen 
Oesterr. bot. Zeits. 53: 313-317. I 
9SHERRARD, T. H., A working plan for forest lands in Hampton and Beaufort 
counties, South Carolina. Bull. no. 43, Bureau of Forestry, U. S. Dept. of Agric. 
PP. 54. pls. 72. figs. 11. 1 map. 1903. 
 Scuwarz, G. F., The diminished flow of the Rock River in Wisconsin and 
Illinois, and its relation to the surrounding forests. Bull. no. 44, Bureau of For- 
estry, U. S. Dept. of Agric. pp. 27. dls. 6. 2 maps. 1903. 
™ CHARPENTIER, P. G., Sur ]’assimilation du carbone par une algue vertue. Compt. 
Rend. 134: 671-673. 1902. 
72 REPORT of the Bureau of Forestry of the Philippine Islands from July 1, Igo1, 
to September 1902. pp. 451-527. Report of the Philippine Commission. 
