136 
Ranunculacee—A Comparative Study of the Roots of. Fred. B. 
Maxwell. (Bot. Gaz. xviii. 8-16; 41-47. Three plates). 
Rio de La Plata; Its Basin, Geography and Inhabitants. Thomas 
Morong. (Bull. Amer. Geograph. Soc. xxiv. 479-509). 
Delivered originally as a lecture before the American Geo- 
graphical Society, and now printed as an article in its Bulletin, 
accompanied by a map of the region traversed. This is a run- - 
ning account of a trip made by the author up the rivers Plata, 
Parana and Paraguay in the year 1888, and a sojourn for the two 
following years at Asuncion, the capital of Paraguay. Brief de- 
scriptions are given of Montevideo, Buenos Aires and Asuncion, 
the manners of their inhabitants, the character of the pampas and 
campos, and the characteristics of the rivers and the vegetation 
upon their banks, ending with a short account of the wild tribes of 
Indians inhabiting the wilderness of the Gran Chaco in Paraguay. 
Root-Pressure—An Apparatus for Determining the Periodicity of. 
M. B. Thomas (Proc. Ind. Acad. Sci. 1891, 82, 83). 
Root Rotwf Alfalfa. (Bull. 22 Texas Exp. Station). 
A new and serious trouble of fungous origin not yet well 
known on Medicago sativa. 
Vacation in the Hawauan Islands. D.H. Campbell. (Bot. Gaz. 
XVii. 410-416; xviii. 19-25). 
Viole Chilenses—Ein Beitrag zur Systematik der Gatting Viola. 
Karl Reiche. (Engl. Bot. Jahrb. xvi. 403-448). 
A descriptive list of 46 species of Chilian Violets, several of 
which are new. 
