160 NATURAL HISTORY CALENDAR. 
Prof. Agassiz’ party in Brazil, starts this month to explore western 
Iowa, both be collect and study the animals and fossils of that little- 
known region. If successful in this field, he intends to push on, 
another season, to the Rocky Mountains, and collect in that region. 
Sees 
CORRESPONDENCE. 2 
G. H. K.—The most brief and erp Manuals of Tax- 
idermy, or the art of preparing cota ns of Natural History for the 
cabinet, are those published by the Smithsonian “kött tution, Wash- 
ington, D. C., in pamphlet form, apnay the Pirecsone for collect- 
ing, preserving, and transporting specimens of Natura . 
d Hi Tere —Among the best works from which to 
gain a ral knowledge of Natural deme are Prof. Asa Gray’s 
Biat p embracing the following 
How Plants Gro 
First Lessons in Bota 
Manual of Botany of the ‘United States. Illustrated. 8vo. Publish- 
ed by as Be Ivison & Phinney, New York. 
Gould’s Principles of Zodlogy. Gould & Lincoln, Boston. 
Say ss Nature. By H. J. Clark. Appleton & Co., New York, 1866. 
Tenney’s Zoölogy for Schools. C. Scribner, New Yor 
Harris’s Insects Injurious to Vegetation. Nichole & è Noyes, Boston. 
Westwood’s Classification of Insects. Lond rols. 8vo. 
Dana’s Manual of Geology. T. Bliss & Co., Piia ia. 8vo. 
Hugh Miller’s te’ Geology, and other works, published by 
Gould & wal Bos 
Prof. A. Guyot’s peau on Physical Geography, with his Physical 
Maps. C. oo New York. Earth and a Man. Gould & Lincoln, 
Boston. 
NATURAL HISTORY CALENDAR. 
ae woe 
CAL CALENDAR FOR May.—The first half of Maya wit- 
thought in some seasons there are many representatives of 
maining till the close of the month. 
