20 



THE AMERICAN MONTHLY 



[Jan. 1881. 



stand and exhibited its working, together 

 with some objectives and accessories. Its 

 workmanship and finish was of the highest 

 class and the various movements were ad- 

 mirably smooth and even. 



An interesting demonstration was given 

 by the President, Mr. Geo. K. Collins, of 

 Prof. H. L. Smith's quick method of 

 mounting diatoms in hard balsam. Some 

 miscellaneous work prepared by the va- 

 rious members of the Society was exhibit- 

 ed. 



CENTRAL ILLINOIS. 



The third regular meeting was adjourn- 

 ed from November 11th to the 18th, to 

 enable some of the members, who were at- 

 tending the Tri-state Medical Association 

 in Louisville, Kentucky (Dr. Buck, of this 

 Society, being President of the Associa- 

 tion), to be present. The paper for the 

 evening was read by Dr. Matthews, the 

 President. The Doctor's subject was "The 

 Science of Optics as applied to the Mi- 

 croscope." He treated his subject well, 

 making all his statements clear and accu- 

 rate. His black-board illustrations were 

 very fine. A number of interesting objects 

 prepared by the different members were 

 examined. 



The instruments in use during the eve- 

 ning were by R. & J. Beck, and Crouch, 

 of London, and by Edward Kahler, of 

 Washington, D. C. 



THE FORT WAYNE MICROSCOPICAL SO- 

 CIETY 



was organized September 18th, i880. Re- 

 gular meetings are held on the second 

 Friday evening, and social meetings on 

 the fourth Friday evening, of each month, 

 at the residences of the members. 



The officers are as follows : President, 



F. W. Kuhne ; 1st. Vice-president, C. A. 

 Dryer, A. M., M. D. ; 2d. Vice-president, 



G. W. McCaskey, M. D. ; Secretary, C. 

 L. Olds ; Corresponding Secretary, Lem. 

 R. Hartman ; Treasurer, Paul F. Kuhne. 



Exchanges. 



[Exchanges are inserted in this co'.umn without 

 charge. They will be strictly limited to mounted 

 objects, and material for mounting.] 



Wanted — Polycystina, Foraminifera. Diatomaceous 

 Earths, or other material or mounted objects, in ex- 

 change for Diatoms in situ and free, Diatomaceous 

 Earths, Alga;, and many of the other Cryptogramia 

 showing structure or fructification, and a large variety 

 of miscellaneous material. Only strictly first-class 

 objects offered or desired. 



M. A. BOOTH, Longmeadow Mass. 



For diatoms in situ on Algse, send mounted slide to 

 K. M. CUNNINGHAM, Box 874, Mobile, Ala. 



For exchange : Mounted thin sections of whale- 

 bone, soapstone, serpentine, albite, feldspar, etc.; 

 also opaque mounts of several very beautiful fossil- 

 iferous limestones. 



Rev. E. A. PERRY, Quincy, Mass. 



Fine injected specimens of kidney, tongue and 

 liver, also very fine slides of human tooth, prepared 

 according to the method of Dr. Bodecker, showing 

 the protoplasmic net-work between the dentinal can- 

 aliculi, in exchange for first-cla.ss histological and 

 pathological slides, or other good specimens. 



J. L. WILLIAMS, North Vassalboro, Me. 



Slides of hair of Tarantula, very curious ; also 

 crystalline deposits from urine, to exchange for well- 

 mounted slides. S. E. STILES, M. D., 11 

 109 Cumberland St., Brooklyn, N. Y. nl 



Well-mounted, typical Pathological and injected 

 Histological preparations, in exchange for other well- 

 mounted slides, Diatoms, Algse and Fungi preferred. 

 HENRY FROEHLING, 

 59 N. Charles Street, Baltimore, Md. 



Diatomaceae from Lake Michigan (Chicago water 

 supply), mounted or raw material : also diatoms from 

 other localities, to exchange for well-mounted Diatom- 

 aceae or other objects of interest. B. W. THOMAS, 

 1842 Indiana Ave., Chicago, Ills. 



Lime sand, composed almost exclusively of micro- 

 scopic Foraminifera, to exchange for microscopic 

 material. H. A. GREEN, Atco, N. J. 



Polyzoa, Palates of Mollusca, Foraminifera, Sponge 

 and Holothurian-Spicules, Synapta-Anchors, Chirod- 

 ota-Wheels, Echinus-Spines, Minute Sea Shells, in ex- 

 change for Polyzoa, Foraminifera, Histological and 

 Pathological preparations, etc. Also, a quantity of 

 Sea Shells in exchange for Land and Fresh-Water 

 Shells. 



F. M. HAMLIN, M. D., Auburn, N. Y. 



J. J. B. Hatfield, Arsenal Avenue, Indianapolis, 

 Indiana, will exchange Bleached Plant-Sections for 

 good Diatomaceous material. List furnished on ap- 

 plication. 



To exchange, well-mounted Slides of Hair for 

 mounted or unmounted specimens of hair from the . 

 rarer animals ; lists exchanged. WM. HOSKINS, ' 

 208 S. Halsted street, Chicago, III. 



Slides mounted from injected Frog's Gall-bladder, 

 Liver, Kidney, Stomach, Intestine and other parts, 

 exchanged for other good and interesting prepa- 

 rations. C. BLASDALE, M. D., 



Jericho, Queens Co., N. Y. 



BINDING. 



Subscribers to this Journal desir- 

 ing to have their sets bound, can send 

 them to D. & J. Sadlier & Co., 

 No. 31 Barclay Street, New York 

 City, who will bind Volume I, in 

 cloth, for $0.75. 



