139 



Harper, Roland M. Competition 

 between two oaks. Plant World, 

 Tucson, Ariz., 10, 1907, (114-117, with 

 text fig.). [3200]. 37967 



— ■ — • — — • A statistical method for 

 comparing the age of different floras. 

 Torreya, New York, N.Y., 5, 1905, 

 [1906], (207-210). [4700]. 37968 



— • — ■ • A Long island cedar- 

 swamp. Torreya, New York, N.Y., 

 7, 1907, (198-200). [8000 gg]. 37969 



Harper, Robert A[lmer]. Sex-deter- 

 mining factors in plants. [Address 

 given before the American Society of 

 Naturalists at Columbia University, 

 New York, December 28, 1906.] 

 Science, New Y'ork, N.Y., (N. Ser.), 

 25, 1907, (379-382). [3440]. 37970 



— • — • Sexual reproduction and 



the organization of the nucleus in cer- 

 tain mildews. [With bibliography.] 

 Washington (Carnegie Institution), 

 [Publication No. 37], 1905, (104, with 

 pi.). 25 cm. [1660 7700]. 37971 



Harreveld, Ph[ilippus] van. Die Un- 

 zuliinglichkeit der heutigen Klinostaten 

 fiir reizphysiologische Untersuchun- 

 gen. Nijmegen, Rec. Trav. Bot. Neerl., 

 3, [1907], (172-312, mit 3 Taf. und 14 

 Fig.) ; Groningen (M. de Waal), 1907, 

 (144, mit 3 Taf. und 14 Fig.). 22 cm. 

 [0090 3180]. 37972 



Harries, C[arl]. Ueber Kautsehuk. 

 Vortrag . . . Gummiztg, Dresden, 21, 

 1907, (823-826) ; Zs. angew. Chem., 

 Berlin, 20, 1907, (1265-1271). [3120]. 



37973 

 Harris, Carolyn W. Lichens of the 

 Adirondack league club trsict. Bryolo- 

 gist. Brooklyn, N.Y., 10, 1907, (64-36). 

 [7600 8000 gg]. 37974 



Harris, Isaac F. Nucleic acid of the 

 wheat embryo. [Thesis, M.S., University 

 of North Carolina.] Chapel Hill, N.C., 

 J. Elisha Mitchell Sci. Soc, 19, 1903, 

 (50-60). [3120]. 37975 



Harris, J[ames] A[rthur]. The search 

 for mutations Amer. Nat., Boston, 

 Mass., 41, 1907, (47C-473). [4500]. 



37976 



— Apparently imparipinnate 



leaves in Cassia. Plant W^orld, New 

 York, N.Y., 9, 1906, (139-142, with 

 text fig.). [1060 5400]. 37977 



Harris, M[ary] O'Brien. Seasonal 

 botany ; a supplementary text-book. 

 London (Blackie & Son), 1906, (1-56). 

 17 cm. 8d. [0050 3350]. 37978 



Harris, Norman MacLeod. Bacillus 

 mortiferus (nov. spec). [With biblio- 

 graphy.] J. p]xp. Med., Baltimore, 

 Md., 6, 1905, (519-547, with pi.). 3797^ 



Harrison, A. K. and others (Commit- 

 tee). Reports on the flora of the Bostort 

 district. — -1. [Ferns.] Rhodora, Bos- 

 ton, Mass., 9, 1907, (81-86). [670O 

 8000 gg\ 37980> 



Harrison, B. Paspalum grass [P. 

 dilatatum]. London, J. Soc. Arts, 55, 

 1907, (490). [6000]. 37981 



Harrison, F. C. [and] Barlow, B. 

 The nodule organism of the Legumino- 

 sao, its isolation, cultivation, identifi- 

 cation and commercial application. 

 [Pseudomonas radicicola]. Centralbl. 

 Bakt., Jena, Abt. 2, 19, 1907, (264- 

 272, 42e-141, mit9Taf.). [7700 3060 

 4300]. 37982 



Harshberger, John W[illiam]. A 

 grass-killing slime mould. Philadelphia, 

 Pa., Proc. Amer. Phil. Soc, 45, 1906. 

 [1907], (271-273). [4050 4300]. 37983 



• Teratologic notes. Plant 



Word, Tucson, Ariz., 10, 1907, (18C- 

 189, with text fig.). [1800]. 37984 



•— Observations on the for- 

 mation of algal paper. Toneya, New 

 York, N.Y., 7, 1907, (141-142). [7400]. 



37985 



Hart, Charles A[rthur] and Gleason, 

 Henry Allan. On the biology of the 

 sand areas of Illinois. [With biblio- 

 graphy.] Urbana, Bull. 111. Lab. Nat. 

 Hist.,7, 1907, (2 Z. + 137-272+ H., with 

 map and pi.). [0030 8000 gg]. 3798(> 



Harter, L. L. The variability of 

 wheat varieties in resistance to toxic 

 salts. [With bibliography.] Wash- 

 ington, D.C., U. S. Dept. Agric, Bur, 

 Plant Ind., Bull., No. 79, 1905, (1-18). 

 [3200]. 37987 



Hartmann, Fritz. Die fossile Flora von 

 Ingramsdorf. Diss. Breslau (Druck 

 V. Grass, Barth & Co.), 1907, (38). 

 22 cm. [7300 1 8000 dc]. 37988 



Hartmann, Max und Prowazek, S. 

 von. Blepharoplast, Caryosom und 

 Centrosom. Ein Beitrag zur Lehre von 

 der Doppelkernigkeit der Zelle. Arch. 

 Protistenkunde, Jena, 10, 1907, (306- 

 335). [2740]. 3798d 



■ • V. Kisskalt, Karl. 



— ■ ■ V. Miihlens, Pet^sr 



