vi ADVERTISEMENTS. 
The International Journal of 
Microscopy and Natural Science. 
EDITOR: 
ALFRED ALLEN, Bath, England. 
Faai de ^ac ubi 
AM, O >o F. R M: S; Chicago University, U. S. 
FRE FDERICK GAERTNER. A. M., M. kj ee = Biusburgh, Pa. Unb. A. 
J. STEVENSON BROWN, President, Noni Micro » Montreal, Canada. 
FILANDRO VICENTINI, M. , Chie 
The following are a portion of the Contents for January, 1893. 
Polarised Den iri its Appleton y the P (Illustrated.) G. H. Bryan, M. A. 
Reichert’s Hæ eter. A uses ed.) F. Gaertner, M. D. 
The M Er doa Mid Its Accessories. (Illustrated. y The Edi 
‘A Device to take the place of the Camera Lucida in MANY. duck soe ri 
H. G. Piffard, M. D. 
A ws are Month by the oe = ern MIA 
Soaking Tissues and Sections of Tissu JW . Pla xton, M. D., m 
punk Sections E Teeth for T pss ee tA ete, Prof, V. A. Latham 
The Bot 
Housse Techn nique 
Half an hour at the Microscope with the late Tuffen West, F. R. M. S, F. L. S., 
(Illustrated 4 Litho. lesa 
— har ger the Postal Micro. Soc. siad A. (Illustrated. ) 
Que Correspondence. Reviews, etc. 
REIR United States and Canada, $2.75 the year, post free. 
Agent: M. A. BOOTH, F. R. M. S, 
LONGMEADOW, MASS. 1298 
PLASTER CASTS OF THE FOLLOWING MAMMALIA 
with dentition in good preservation, made under direction of 
Professor E. D. Cope may be had by application to Jacob 
Geisman, 2102 Pine St., Philadelphia. 
Phenacodus primaevus Cope, (Wyoming) $100.00. Æy- 
racotherium venticolum Cope, (Wyoming) $50.00. Protohippus 
micabilis Leidy, skull $7.00. Protohippus pachyops Cope, skulls 
of adult and young, and P. fossulatus Cope, skull, $5.00 each. 
_ Letrabelodon shepardii Leidy, mandibular ramus and symphysis 
with two molars, $20.00. Dzbelodon tropicus Cope, do., $15.00; 
Mastodon precursor Cope, last molar $5.00. The horses and 
‘mastodons from the Cenozoic beds of Texas, are uncolored. 
