THE MIcROSCOPE. 939 
Notice the new ads in this number on pages I and VII. 
By sending one dollar now, all new subscribers will receive 
the JourNnaL for the remainder of this year and all of 1885. 
The third edition of our Manual of Histology is just from 
the press. The work has been entirely rewritten, greatly en- 
larged, and newly illustrated. The price is $3.50. 
Parties remitting four dollars will receiye the work post- 
paid and this journal until January, 1886. 
A prospectus will be sent to all who desire it. 
EXCHANGES. 
(Exchanges are inserted ox this page without charge. Subscribers having 
microscopic apparatus for saleor exchauge can announce thesame without charge). 
ISTOLOGICAL and Pathological slides to exchange for other good 
slides. F. F. COLWELL, Urbana, Ohio. 
RESH-WATER ALGAAS, nearly all genera, and many beautiful vari- 
eties; also euglena, astasia, etc., for good pathological or other inter- 
esting slides. Lists exchanged. J. M.ADAMS, Watertown, N. Y. 
OULD like to exchange a } Bausch & Lomb patent adjustment (glyc- 
erine front) objective, almost new, for alg ot moderate angle, C. B. 
HIGBY, Mokelumne Hill, Cal. Co., California. 
HAVE a first class black glass rotating stage, with sliding object carrier 
kept down by ivory pointed screw. Will exchange for a low power ob- 
jective, works on microscopy, or first-class mounted objects, HAROLD 
PLOWE, 136 High St., Peoria, III, 
ANTED.—Diatoms on Alge, from the Sandwich Islands. Calitornian 
coast, and other tropical sea coasts. Will give in exchange either 
very good mounted micro-slides or cash for good material. J. C. PRINN- 
BOCH, 14 Simmering, Wien, Austria. 
OR SALE.—A copy of Prof. Leidy’s great work on the Rhizepods has 
been left at this office for sale. Price $7.50 ©. H.STOWELL. 
WILL exchange good, histological for other first-class mounts. S. G. 
SHANKS, M. D., 547 Clinton Avenue, Albany, N. Y. 
ISTOLOGICAL mounts to exchange for other good slides. ‘I. B. 
STOWELL, Ph. D., Cortland, N. Y. 
UNDLAGH’S adjustable 1-5 objective, 135° aperture, for sale. Dr. A. 
C. Stokes, Trenton, N. J. 
IATOMS ON ALGA. Achnanthes bevipes, etc., Polycistana, Fossi 
Diatoms, ete., Sertularia Pluma, Sertularia Crustata, ete. Spore case 
of Fern too numerous to mention, to exchange for well mounted objects 
WM. FARNELL, Macon, Ga. 
