No. 405.] REVIEWS OF RECENT LITERATURE. 769 
Professor Stanley Coulter contributes an annotated catologue of 
the spermatophytes and pteridophytes of Indiana to the twenty- 
fourth Annual Report of the Department of Geology and Natural 
Resources of that state. 
In La Semaine Horticole of June 9 M. Rodigas states that in Paris 
are cultivated not far from go,ooo trees, the average duration of the 
principal species of which is placed as follows: horse-chestnut, 
II5 years; sycamore, 61; ailanthus, 54; locust, 42; linden, 24; 
Paulownia, 14. The mortality among the trees in the center of the 
city is said to be twice as great as in the suburbs, and the principal 
causes of their death are given as: (1) dust on the leaves; (2) 
reverberation of solar rays from buildings; (3) gas, etc., in the soil ; 
(4) injury to trunks and branches; (5) lack of aération of roots; 
(6) the use of salt after snow falls in winter. 
The Yearbook of the United States Department of Agriculture for 
1899, recently issued, contains a number of résumés of progress in 
science as applied to agriculture, by competent writers, which give 
the volume an unusual interest and value for the teacher’s library. 
The Proceedings of the Society for the Promotion of Agricultural 
Science for 1899 contains an index to the contents of the publica- 
tions of that body during its existence that will greatly facilitate 
reference to the often valuable matter that they contain. 
Der Tropenpflanzer for June contains an interesting article on 
cotton production and manufacture, illustrated by maps and the 
most effective graphic devices. 
The application of photography to scientific illustration finds 
exemplification in Mr. Woods's paper on Stigmonose, a disease of 
carnations and other pinks, recently published as Buletin No. 19 of 
the Division of Vegetable Physiology and Pathology of the United 
States Department of Agriculture. Among other things the sucking 
apparatus of aphides, fixed in situ, is represented in leaf sections, 
and it is interesting to observe that these creatures afford a practical 
demonstration of the course of the flow of sap, since their beaks 
seek the fibro-vascular bundles of the leaves. 
A biographical sketch of Edwin Faxon, accompanied by an excel- 
lent portrait, appears in Ahodora for July. 
