496 
OBITUARY, EXCHANGES, ETC. 
only be attained through improvement in the existing microscope. 
The improvements were so imperfect that improvements in their 
onstruction were imperatively necessary. The operator himself 
could alone realize the great need, and through perpetual com¬ 
plaint and fault-finding the microscope makers were induced to 
make improvements. The optical power was so imperfect the 
operators themselves often made important improvements. We 
recall at present Leewenhock, Hook, Euler von Gleichen. 
EXCHANGES AND JOURNALS. 
HOME EXCHANGES.—American Bookseller, Scientific American, Hospital 
Gazette, Medical Record, Country Gentleman, Turf, Field and Farm, New 
York Rural, American Agriculturist., Prairie Farmer, Practical Farmer, 
Ohio Farmer, Scientific Farmer, Maine Farmer, National Live Stock 
Journal, Western Sportsman and Live Stock Journal. 
FOREIGN EXCHANGES.—Journal de l’Agriculture, Veterinarian, Veterinary 
Journal, Recueil de Medecine Veterinaire, Archives Veterinaires, Mouve- 
ment Medical Cliuica Veteirnaria, Revue fur Thierheilknnde und Thier- 
zucht, Archiv fur Wissnrschaftliche uud practishe Thierheilknnde, Baud 
IV, 6 Heft, Bulletin de la Soci^te Centrale de Medicine Veternaire. 
NEWSPAPER.—Western Sportsman, Western Agriculturist, Our Dumb Ani¬ 
mals, Vermont Record, The Ploughman, The Leader, New England Far¬ 
mer, VerFarm Journal, Central Union Agriculturist, The Weekly Mail, 
CATALOGUES.—Physician and Pharmacist Record, AibanyMedical College In¬ 
troductory Lecture, Scientific American Catalogue. 
F. S. Billings, V.S., A. A. Holcombe, D.V.S., R. Wood, V.S., W. J. Coates, 
D.V.S., G. P. Pennimau, D.V.S., F. S. Winchester, D.V.S., Nemo, Truth, 
J. Gextb, Jr. 
