INDEX TO AMERICAN BOTANICAL LITERATURE 153 
Fox, A. Nut fall and leaf droop of coconut palms in Cuba. Cuba 
Rev. 17: 12-15. Dig18._ [Illust.] 
Free, M. Effect of low temperatures on greenhouse plants. Brooklyn 
Bot. Gard. Rec. 8: 14-18. Ja 1919. 
Freeman, E. M_ The story of the black stem rust of grain and the 
barberry. Minnesota Agr. Ext. Div. Bull. 27: 1-8. f. 1-5. Ap 1918. 
Gardne-, N. L. New Pacific coast marine algae—III. Univ. Calif. 
Publ. Bot. 6: 455-486. pl. 38-41. 3 D 1918. 
Includes new species in Placoma (1), Dermocarpa (2), Xenococcus (3), Pleurocapsa 
(2), paoculnel (1), Phormidium (1), Symploca (2), Microcoleus (2), Calothrix (2), 
Dichothrix (2), Rivularia (1), and Brachytrichia (x 
Gleason, H. A. Echinacea purpurea. Adiuobhs 3t.67,- 66. D1, Trg. 
30 D 1918. 
Goodspeed, T. H., & Hodgson, R. W. Note on the effects of illumi- 
nating gas and its constituents in causing abscission of flowers in 
Nicotiana and Citrus. Univ. Calif. Publ. Bot. 5: 439-450. 28 D 1918. 
Gustafson, F. G. Comparative studies on respiration—II. The 
effect of anesthetics and other substances on the respiration of 
Aspergillus niger. Jour. Gen. Physiol. 1: 181-191. f. 1-5. N 1918. 
Harper, R. M. A sketch of the forest geography of New Jersey. 
Bull. Geog. Soc. Philadelphia 16: 107-124. O 1918. 
Harvey, R.B., & True, R. H. Root absorption from solutions at mini- 
mum concentrations. Am. Jour. Bot. 5: 516-521. f.z, 2. D 1918. 
Hayes, H.K. Natural crossing in wheat. Jour. Heredity 9: 326-330. 
Piae tse 12D sore. 
Heinicke, A. J. Factors influencing the abscission of flowers and 
partially developed fruits of the apple (Pyrus malus L.). Cornell 
Agr. Exp. Sta. Bull. 393: 45-113. f. 1-8. Jl 1917. 
Hodgson, R. W. An interesting bud-sport in the Washington navel 
orange. Jour. Heredity 9: 301-303. f. 2. 12 D 1918. 
Kezer, A., & Sackett, W. G. Beans in Colorado and their diseases. 
Colorado Agr. Exp. Sta. Bull. 234: 1-32. f. 7-6. Mr1918._ [Illust.] 
Killip, E. P. A year’s collecting in northeastern United States. Am. 
Fern Jour. 8: 121-126. 20 Ja 1919. 
Livingston, B. E. Porous clay cones for the auto-irrigation of potted 
plants. Plant World 21: 202-208. Au 1918.  [Illust.] 
Loeb, J. Amphoteric colloids—II. Volumetric analysis of ion- 
protein compounds: the significance of the isoelectric point for the 
purification of amphoteric colloids. Jour. Gen, Physiol. 1: 237-254. 
jf. 1-8 WN 1918. 
