,Piz- 
PROSPECTUS OF 
Hcilf-Hour Recreations in Natural History. 
They will be issued in the same elegant form that has made Recreations 
in Popular Science” so attractive, and will consist of several volumes. Each 
volume will contain 12 parts, of about 3G pages, and will be elegantly illustrated. 
PRICE, 25 CENTS PER PART. 
Vol 1. will be HALF-HOURS WITH INSECTS, by A. S. Packard, Jr., 
the distinguished Entomologist —The 12 parts of this vol- 
ume will be sent post-paid, as issued, on receipt of $2.50 
in advance. 
To be followed by 
Von. II. 
HALF-HOURS 
WITH BIRDS. 
“ III. 
u 
“ AVIED ANIMALS. 
“ IV. 
“ 
DOMESTIC ANIMALS 
“ V. 
a 
“ REPTILES. 
“ VI. 
u 
“ PLANTS. 
“ VII. 
u 
“ TREES. 
“ VIII. 
i s 
“ FISHES. 
Each volume Avill be carefully edited by a competent person, who has made a 
specialty of the study of that branch of natural science. 
Half-Hour Recreations in Popular Science. 
Edited by DANA ESTES. 
The growing demand in this country for books on popular science, encourages 
the editor and publisher, to issue this series of papers, compiled from the works of 
the most popular scientific writers. 
25 Cts. per Part ; $2.50 for 12 Consecutive Parts. 
No. 1. Strange Discoveries respecting the Aurora and recent Solar Researches. By 
Richard A. Proctor, F. R. A. S. 
No. 2. The Cranial Affinities of Man and the Ape. By Prof. Rudolph Virchow, of Ber¬ 
lin, author of “Cellular Pathology.” Fully Illustrated. 
No. 3. Spectrum Analysis Explained, and its Uses to Science Illustrated. With a Colored 
Plate and several Wood Cuts. 
No. 4. Spectrum Analysis Discoveries, showing its Application in Microscopical Research, 
and to Discoveries of the Physical Constitution and Movements of the Heavenly Bodies. From the 
works of Schellen, Young, Roscoe, Lockyer, Huggins, and others. 
No. 5. Nebulae, Meteoric Showers, and Comets. 
No. 6. Unconscious Action of the Brain, and Epidemic Delusions. By Dr. Carpen¬ 
ter, author of “The Microscope and its Revelations,” “Human Physiology,” &c. 
No. 7. The Geology of the Stars. By Prof. A. Winchcll, of the University of Michigan, 
author of “Sketches of Creation.” 
No. 8. On Yeast, Protoplasm and the Germ Theory. By Thomas nuxley, F. R. S.;—and 
The Relation between Matter and Force. By Prof. John II. Tice. 
No. 9.. The Stone Age, past and present. By E. B. Tylor, author of “Primitive Culture,” 
&c., &c.;—and Theory of a Nervous Ether. By Dr. Richardson, F. R. S. 
No. 10. The Origin of Metalliferous Deposits, By T. Sterry Hunt, F. R. S.;—and The 
Phenomena of Sleep. By Dr. Richardson, F. R. S. 
No. 11. Coal as a Reservoir of Power. Bv Robert Hunt, F. R. S.;—and Atoms. Bv Prof 
Clifford, M. A. " J 
No. 12. The Circulation of the AVaters on the Face of the Earth. By Prof. H. W. Dove. 
Entered nccording to Act of Congress, in the year 187.1, by Estes & L achi at, in the Office of the Librarian of Congress, at Washington, 
