3 
MICROSCOPES—SURVEYING AND OTHER 
INSTRUMENTS. 
Messrs. J. & W. GRUNOW, 
OF NEW HAVEN, CONN. 
Messrs. J. & W. G. make to order AcHRomaric Micsoercras of 
superior excellence i in all respects, and of every variety of form and 
price.—ALso— 
Surveying and Astronomical Instruments, 
whose superior excellence of workmanship, construction and accuracy, 
have been frequently acknowledged. 
For the quality of their instruments, Messrs. J. & W. G. are per- 
mitted to refer to the Editors of this Journal. To Profs. D. Olmsted 
and W. A. Norton of Yale College; Prof. W. Gibbs of New York 
Free Academy ; Profs. C. R. Gilman and A. Clark, M.D., of the Crosby 
Street Medical School, New York; Dr. H. Vahntedale: Morristown, N.J.; 
Prof. J. L. Riddell and James Jones, M.D., New Orleans, and Dr. J. L. 
Smith, Toutuvitle, 
Priced Catalogues sent to order. (July, 1855.—tf 
G. P. PUTNAM & Co., New York. 
EXPLORING EXPEDITION REPORT ON CRUSTACEA. 
By James D. Dana. 2 vols. 4to, 1620 pages, and 96 plates in large 
folio, partly colored. 
EM OF PEER ALOGY» By James D. Dana. 4th edition. 
2 vols. 8yo, 320 an pages. 
New York, 1854, 
