1897.] Recent Literature. 511 
Year Book of the U. S. Agricultural Department for 1895.” 
—It has been the aim of the Department of Agriculture to make this 
report for 1895 a concise reference book of useful information for all 
who are interested in agricultural pursuits. It consists of (1) a general 
report of the operations of the Department, (2) a series of popular 
well-illustrated essays discussing the results of investigations in agricul- 
tural science, or new developments in farm practice, (3) an appendix 
containing information compiled from miscellaneous government pub- 
lications. The volume is especially adapted to the farmers of the 
country. 
Mach’s Popular Lectures.’—A series of twelve popular scien- 
tific lectures delivered by Herr Mach during the years 1864-94, are 
here published in collected form for the first time. The volume at 
hand is an English translation by T. J. McCormick, whose version is 
endorsed by Herr Mach. The subjects are chosen from the field of 
Physics. In all, twelve lectures are given, four of which are of a 
philosophical character, and deal with the methods and nature of 
scientific inquiry. 
Martin’s Human Body.‘—We have here the seventh edition of 
the well-known text-book, originally issued in 1880. The present edi- 
tion has been brought up to date by revision and correction of the old 
text, and by the addition of new matter, especially in connection with 
the cardiac and vascular nerves, and the physiology of the brain. In 
its present form it stands close to the ideal text-book. The facts are 
stated simply and concisely, repetition avoided, and, in general, its aim 
seems to be to present what is known as such, but at the same time to 
suggest opportunities for further discoveries in physiological science. 
The illustrations are numerous and well-chosen. About thirty, 
chiefly diagrammatic, were drawn especially for the work. 
Geology of Pennsylvania.'’—This work constitutes Vol. III, Pt. 
1 of the Summary Description of the Geology of the State. It con- 
tains Prof. Lesley’s chapters on the subconglomerate measures, Mr. 
2 Year Book of the U. S. Department of Agriculture for 1895. Washington, 
1896. 
3 Popular Scientific Lectures. By ~~. Mash. Translated by T. J. McCor- 
mick. Chicago: Open Court Pub. Co., 
*The Human Body. By H. Newell Mia. Seventh edition, revised. New 
York, 1896 : Henry Holt & Co., Pub. 
5 Summary Final Report Pennsylvania Geological Survey, Vol. III, Pt. I, 
1895. Carboniferous. 
