264 THE MICROSCOPE. 
EXCHANGES. 
(Exchanges are inserted without charge. Subscribers having microscope apparatus for sale or 
exchange can announce the same without charge.) 
POLLEN and Vegetable slides double stained (new method) 50 cts. each. Slides and for- 
mule of new stains etc., 75 cts. each. A large variety of pollen, 5 cts. apackage.. 
J.D. BECK, Liberty, (Tioga Co) Pa. 
WANTED—A Milliampermeter in exchange for cabinets slides or cash. 
CHAS. BLASDALE, M. D,. Jericho, Queens Co., Neve 
SLIDES, labels for same and material in exchange for slides. 
EUGENE PINCKNEY, Dixon, Ill. 
ANTED—Microscope of modern make, Bausch & Lomb Investigator preferred. Also 
Foraminifera Polycistina. Will give fine slides or cash. 
E. H. RICHARDS, Woburn, Mass. 
WANTED—Good Zentmeyer Microscope Stand,’ Binocular preferred, none but a first 
class instrument. M. DE BALD, 136 Goodell st., Buffalo, N. Y. 
FOR EXCHANGE.—Living specimens of Volvox Globator by mail for other ‘‘raw ma- 
terial” or mounted slides. Also one of Queen’s dollar sets of untreated diatoms. 
Polycystines especially desired 
ROBT. W. WOOD, JR., Revere St., Jamaica Plain, Mass. 
FoR EXCHANGE.—Mounted sections of injected lung of guinea pig. 
CHAS. BLASDALE, Jericho, Queens Co., N. Y. 
FOR EXCHANGE—Mound builders relics, pottery fragments and Indian relies for 
medical books and surgicalinstruments. DR. HENRY W. COE, Mandan, Dakota. 
FRESH WATER ALG, very numerous species, including Volvox in abundance, Des- 
mids, of all kinds, Draparnaldia, Rivalaria, Anabaena Tetraspora &c., &c. 
; J. M. ADAMS, Watertown, N. Y. 
DIATOMACEOUS Earth from Denver, Col., in exchange for mounting material. ; 
H. B. CHAMBERLIN, box 1597, Denver, Col. 
if HAVE for exchange Stellate Hairs of Plants, Pollen, and Seeds ; also various Diatoms, 
Polycistina, etc., anda variety of other good objects, all well mounted. 
W. FARNELL, Macon, Ga. 
FOR SALE.—A copy of Prof. Leidy’s great work on the Rhizopods has been left at this 
office for sale. Price, $7 50. C. H. STOWELL. 
I WILL exchange good histological for other first-class mounts. 
S.G. SHANKS, M. D., 547 Clinton Avenue, Albany, N. Y. 
A CARLINSECTS, pathological and other well mounted slides, in exchange for Pleuro- 
sigma, Trichina, Diatoms, Stained Bacteria, ete J. O. Stillson, Indianapolis, Ind. 
A MPHIPLEURA PELLUCIDA, or any other test diatom, mounted in the new medium 
having refractive index of 2, 4, can be procured from H. H. CHASE, Geneva, N. Y. 
DIATOMACEOUS Clay from this place and slides of Foraminifera and Diatoms to ex- 
change for fine slides or material. E. H. RICHARDS, Woburn, Mass. 
ANTED.—Unmounted material of any kind ; foraminifera and diatoms preferred ; 
will give good exchange. M. A. BOOTH, Longmeadow, Mass. 
FOR EXCHANGE—Catheart’s ether freezing microtome. complete. Would prefer an in- 
jecting syringe. A. B. AUBERT, Orono, Penobscot Co., Maine. 
WANTED—No. 5 of Vol 2,and No. 1 of Vol. 3. This journal. Who can ple Sg 
D. HUMPHREY. Lawrence, Mass. 
Rok EXCHANGE—A new mechanical finger for a copy of Beale or Carpenter ; slide of 
grouped diatoms for French objective, 4 inch in focus 
HAROLD POLWE, 136 High St., Peoria, Ill. 
WANITED—Complete or partial set of Woodward’s photo-micrographs ; also to ex- 
change, Bote eee e of various objects ; a list of which will be sent on ap- 
plication JAS. B. SHEARER, Cor. Center & Adams Sts , Bay City, Mich. 
WANXTED— Gross’, Erichsen’s, or Bryant’s Surgery, last edition, in exchange for a 1 in 
Spencer objective, turn-table, Walmsley pattern, or Microscopical books 
Address, Box 213. Fayetteville, N. Y. 
For EXCHANGE.—Pathological and Histological Specimens (mounted and unmounted), 
in exchange for good slides. 
' FRANK M. HOYT, 160 Washington Park, Brooklyn, N. Y. _ 
FoR SALE.—A Bulloch ‘‘ Biological’ Microscope Stand in Case. with two inch and one 
inch Huygh. Eye-pieces, the latter made by Tolles. Has extra glass rotating stage, 
graduated draw-tube, graduated sub-stage and mirror bars, and adapter in draw-tube. 
Price. $35.00. A. L. WOODWARD, 55 Lansing St., Utica, N. Y. 
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