276 The Botanical Gazette. [June, 
the use of stomata. Much stress is laid upon the need of aerating 
the roots, but the author fails to explain why it is necessary if gases, 
as he says, can not pass through imperforate surfaces of plants. 
Such defects, however, may be overlooked in view of the fact that 
the work is to teach a rational horticulture, and not to teach vegetable 
physiology. This is certainly the spirit of the book, in spite of the un- 
fortunate title; and as such the work is admirable, and to be highly 
commended. 
Minor Notices, 
THE NatTurAList’s Directory’ for 1895 comes to us with decided 
improvements. In addition to the alphabetical list, the names are 
arranged geographically (by states) and also by subjects. In the latter 
part of the work the editor has been obliged to omit names from some 
departments when ten or a dozen “specialties” had been given. But 
we judge that the real specialists will be found correctly listed. These 
two additional lists will greatly increase the usefulness of the book 
and we hope will bring a proper reward to the enterprising publisher 
and compiler. 
THE ATTENTION of those who are following Mr. Charles Robertson's 
papers on “Flowers and insects” in this journal is directed to a papet 
by him in the Trans. St. Louis Academy of Science 6: 435-480. 1894 
covering plants included in the families Rosace and Composite. 
To BoTanists who have occasion to use statistical methods we cor- 
dially commend a pamphlet entitled “Statistical Methods,” by G. W- 
Moorehouse. It is a reprint from Mind and Body and is published 
by the Freidenker Publishing Co., Milwaukee, Wis., at 25 cents. 
THE BULLETIN of the Botanical Society of Geneva‘ covering the 
years 1892-4, contains eight papers, dealing chiefly with the local flora. 
Briquet’s “Le Mont Vuache: étude floristique” and Paiche’s “Observa- 
tions sur quelques espéces critiques du genre Hieracium” are of most 
general interest. 
THE LasT semi-annual report of Schimmel & Co. (Fritzsche Bros-) 
of Leipzig and New York contains notes on many essential oils, of 
equal interest to botanists and chemists. 
Neil eee ae 
dresses, 
s essional and amateur naturalists, 
chemists, physicists, astronomers, etc., of the U. S. and Canada. 12mo. 
viii +382. Boston: S. E. Cassino, 1 5. iété 
* Bulletin des travaux de la société botanique de Genéve (section de la soci 
suisse de botanique( no. 7, années 1892-1894. 8vo. pp. 241. I map. 2 figs. 
Genéve: H. Georg. 1894 
E.—The naturalist's directory, containing the names, ad 
se for 
