233 



arhorescens and Epilobium hirsutum-.'] 

 Rhodora. Boston, Mass., 10, 1908, (167). 

 [8000 ggl 46936 



Pechon, L. Principales maladies 

 des arbrcs et des peuplements forestiers 

 dues aux champignons parasites. (Con- 

 ference.) Bruxelles, Bui. Soc. centr. 

 forest., 14, 1907. (324-332, 398-409). 

 [4000]. 46937 



Peck, Charles H[orton]. Report of 

 the State botanist 1907. [Including 

 papers on New York species of Cra- 

 taegus by C. S. Sargent.] Albany, 

 Educ. Dept. N. Y. St. Mus. Bull. 

 No. 122, 1908, (1-175, with col. pi.). 

 [0020 5100 7700 8000 g-g-]. 46938 



• New species of fungi. J. 



Mycol., Columbus, Ohio, 14, 1908, (1- 

 3)". [7700 8000 ^sr]. 46939 



Pedersen, P. M. Botaniske Med- 

 delelser fra Sydfyn. [Floristic contribu- 

 tions from Southern Funen.] Koben- 

 havn, Flora og Fauna, 1906, (8-12). 

 [8000 da]. 46940 



Peglion, Vittorio. Per la rigenera- 

 zione del pesco. Bologna, Ann. Soc. 

 agr. prov., 47, 1907, (73-93). [4000]. 



46941 



Peirce, Mary F. Note on Weigela 

 rosea. [Small gland at base of blossom.] 

 Rhodora, Boston, Mass., 10, 1908, 

 (131-132). [1500 5400]. 46942 



Peirson, H. Oecology of Montia 

 Jontana. J. Bot.. London, 46, 1908, 

 (124). [3200 5400]. 46943 



Pekelharing, Nicolaas Rutger. Sy- 

 stematisch-anatomisch onderzoek van 

 den bouw der bladschijf in de familie 

 der Theaceae. [Etude systematiciue 

 de r anatomic de la lame foliaire dans 

 la familie des Thcacees.] Groningen 

 (M. de Waal), 1908, (116). 23 cm. 

 [1060 5400]. 46944 



Peklo, Jaroslav. Epifyticke mykor- 

 rhizy. I. Monotrofa Hypopitis. [Epi- 

 phytische Mycorrbizen. I. Monotropa 

 Hypopitis.] Prag, Rozpr. Ccske Ak. 

 Frant. Jos., 1908, (25 mit 1 Taf.). 

 [3220]. 46945 



Peli, Arrigo v. Ravenna, C. 



Pellegrin, Francois. Recherches ana- 

 tomiques sur la classification des 

 genets et des cytises. Ann. Sci. nat. 

 (Bot.), Paris, fser. 9). 7, 1908, (129- 

 320). [1000 5400]. 46946 



Pellegrini, Vittorio. La Cnethocampa 

 Pityocampa e modo di combatterla. 

 Atti Congr. Nat. ital. 15-19 settembre 

 1906, Milano, 1907, (744-746). [4350]. 



46947 



Pellet, Henri et Vuaflart, L. Com- 

 position minerale et azotee de la bet- 

 terave a sucre pendant la vegetation. 

 Atti Coner. chim., Roma, 3, 1907, 

 (840-853)^ [3120]. 46948 



Pelourde, Fernand. Sur un nouveau 

 type de petiole de fougere fossile. 

 Paris, C. R. Acad, sci., 147, 1908, 

 (877-879). [6700 1060]. 46949 



Recherches sur la position 



systematique des plantes fossiles ap- 

 pelees Psaronitis, Psaroniocaulon, Cau- 

 lopteris. Paris, Bui. soc. bot., 55, 1908, 

 (88-96, 112-119). [6700 1060]. 



46950 



— Recherches comparatives 



srr la structure de la racine chez un 

 certain nombre de Psaronius. Paris, 

 Bi'l. soc. bot., 55, 1908, (352-359, 

 377-382). [1210]. 46951 



Peltrisot, C[harles] N[arcisse1. De- 

 veloppement et structure de la graine 

 chez les Ericacees. Paris (Vigot), 

 1909, (av. fig.), 25 '^'"- 3 f- [1560 



5400]. 46952 



Pamberton, J. D. v. Coker, W. C. 



Pende, N. e Viviani, L. Un nuovo 

 metodo pratico per colture anaero- 

 biche. Roma, Boll. Ace. med., 33, 

 1907, (152-154). [0090]. 46953 



Penhallow, D[avid] P[earce]. Some 

 fossil plants from the Middle Devonian 

 of Milwaukee, Wisconsin. Milwaukee, 

 Bull. Wis. Nat. Hist. Soc, 6, 1908, (8- 

 12, with pi.). [t7400 mOOgg]. 



46954 



William Smith Clark: 



His place as a scientist and his relation 

 to the development of scientific agri- 

 culture. [An address delivered at the 

 opening of Clark Hall, Massachusetts 

 state college, October 2, 1907.] Science, 

 New York, N. Y., (N. Ser.), 27, 1908, 

 (172-180). [0010]. 46955 



Pennington, L. H. Mycorhiza-pro- 

 ducing Basidioriiycetes. [AVith biblio- 

 graphy.] Rep. Mich. Acad. Sci. 

 [Lansing], 10, 1908, (47-50). [4050 

 7700]. 46956 



Can Fusaria assimilate 



atmospheric nitrogen ? [Abstract.] 



