INDEX TO AMERICAN BOTANICAL LITERATURE 461 
Hart, C. The genus Quercus in California. Lorquinia 1: 18-21. O 
1916. 
Heald, F. D. Potato diseases. Washington Agr. Exp. Sta. Pop. Bull. 
106: 17-94. f. I-26. F 1917. 
Hesler, L. R., & Whetzel, H. H. Manual of fruit diseases. i-xx +. 
403, fo J—1a0., (1017: 
Hildebrandt, F. M. Leaf-product as an index of growth in soy-bean. 
Johns Hopkins Univ. Circ. 293: 202-205. Mr 1917. 
Hill, G. A. Conferva bombycina Agardh in Washington. Puget Sound 
Marine Sta. Publ. 1: 220. pi. 38. 27 D 1916. 
‘Hill, G. A. Origin of second spiral in Spirogyra lutetiana. Puget 
Sound Marine Sta. Publ. 1: 247, 248. pl. 46. 27 D 1916. 
Hill, G. A. Spirogyra dubia longiarticulata Kiitz. in Washington. 
Puget Sound Marine Sta. Publ. 1: 234. pl. 42. 27 D 1916. 
Hill, G. A. Spirogyra gigantica, n. sp. Puget Sound Marine Sta. 
Publ. 1: 198. 27 D ro16. 
Hill, J. B. Manipulating microscopic organisms in staining. Bot. 
Gaz. 63: 410-412. 16 My 1917. 
Hitchcock, A. S. Taxonomic botany and the Washington botanist. 
Jour. Washington Acad. Sci. 7: 251-263. 4 My 1917. 
Hurd, A.M. Codium dimorphum. Puget Sound Marine Sta. Publ. 1: 
211-219. pl. 37. 27 D 1916. 
Hurd, A. M. Factors influencing the growth and distribution of 
Nereocystis Luetkeana. Puget Sound Marine Sta. Publ. 1: 185-197. 
27 D 1016. 
Jeffrey, E. C. Methods of studying coal. Sci. Conspectus 6: 71-76. 
J. 1-6. 1916. 
Also published in Am. Jour. Pharm. 89: 268-274. Je 1917. 
Jensen, C. A. Composition of Citrus leaves at various stages of 
mottling. Jour. Agr. Research 9: 157-166. 7 My 1917. 
Johnson, D. S. The botanical station at Cinchona. Bot. Gaz. 63: 
412, 413. 16 My 1917. 
Johnston, E.S. Seasonal variations in the growth-rates of buckwheat 
plants under greenhouse conditions. Johns Hopkins Univ. Circ, : 
293: 211-217. Mr 1917. 
Karrer, J. Micrometabolism in Nereocystis. Puget Sound Marine 
Sta. Publ. 1: 227-233. pl. 41. 27 D 1916. 
