70 



Waller, Augustus D6sir6. Electrical response of vegetable 

 protoplasm to mechanical excitation. (Proc. Physiol. Soc. 1901.) 

 [London], (1901). 8to. 



Researches in vegetable electricity. (Intemat. Congr. of 



Physiology, Turin, Sept. 1891.) 8vo. 



Wanner, Atreus. See Ward, L. P. 1900. 



Warburg, Otto. Die Kautschukpflanzen und ihre Kiiltur. 

 Berlin, 1900. 8vo. 



Ward, Harry Marshall. Disease in Plants. London, 1901. 8to. 



Ward, Lester Prank. Status of the Mesoaoic Floras of the 

 United ' States. First paper.— The older Mesozoic. With the 

 collaboration of W. M. FONTAINE, A. Wander, and F H 

 Knowlton. (Rep. U. S. Geol. Snrv. xx.) Washington, 1900. 

 8vo. 



Warming, Johannes Eugen Bulow. Familien Podostemaceoe 

 . Afhandling 6. (Vidensk. Selsk. Skr. xi.) Kjobenhavn, 

 1901. 4to. 



rWatt, George.] Ledger record of Economic Plants referred to 

 in VOIGT'S Hortus SuburbanuB Calcuttensi», etc., [and] of the 

 Economic Plants described in DruRY'S Useful Plants of India, 

 ed. 2. [Calcutta, 1884.] 8vo. 



Watts, Prancis. Nature teaching based upon the general 



Welwitsch, Priedrich Martin Josef. Catalogue of the African 

 Plants collected ... in 18r>3-61. Dicotyledons, see Hiern, 

 W P.; Monocotyledons and Gymnosperms, see Rendle, A. B.; 

 Cryp'togamia, see Carruthers, W. & Others. 



Werth, Emil. Die Vegetation der Insel San si bar. Diss. 

 Berlin, 1901. 8vo. 



Westermaier, Max. Ueber gelenkartige Einrichtungeu an 

 Stammorganen. (Bot. Unter^ueh. im Anschluss an eine Iropen- 

 reise, 3.) Freiburg (Schweiz), 1901. Svo. 



Morphologie, Entwicklungs- 

 geschichte und Systematik der Fhanerogamen in «f f^^^f ^^-^^^^ 

 1850 bis 1900. (Festschr. der K. K. zool.-bot. Ges. \\ len.) \\ len, 

 1901. Svo. 



