120 



THE AMEEICAN MONTHLY 



[June, 1881. 



eral very choice botanical slides, several 

 of which were under the microscopes. 



Lucia F. Clark, Cor. Secretary. 



ILLINOIS STATE. 



The annual meeting- was held April 

 22d, 1881, Mr. B. W. Thomas, the Presi- 

 dent, in the chair. Dr. Mcintosh exhib- 

 ited a new and improved microscope, 

 combining an oxyhydrogen attachment. 

 The histological slides shown by this ap- 

 paratus were fine, and called forth very 

 general admiration. Afterward the So- 

 ciety proceeded to the election of officers, 

 resulting as follows : — 



President, Dr. Lester Curtis ; Vice- 

 Presidents, Dr. Frederick W. Mercer, 

 Prof. E. S. Bastin ; Secretary, William 

 Hoskins ; Cor. Secretary, E. B. Stewart ; 

 Treasurer, W. H. Summers ; Trustees, 

 E. J. Hill, B. W. Thomas, W. H. Bulloch, 

 Chas. E. Boring. 



CENTRAL ILLINOIS. 



The regular meeting of this Society was 

 held April 21st, President F. L. Matthews 

 in the chair. 



After the routine business was finished 

 the Society listened to a paper from T. B. 

 Jennings, of the United States Signal 

 Corps. His subject was " Protophytes 

 and Protozoa, or the Simplest Forms of 

 Vegetable and Animal Life compared." 

 He first explained the composition of the 

 vegetable cell, showing that it consisted of 

 the cell-wall and cell-contents, that the 

 cell-wall is composed of two layers of very 

 different composition and properties — the 

 inner, or primordial utricle, being the one 

 first formed is essential to the existence 

 of the cell, while the external layer, 

 though commonly supposed to be the 

 proper cell-wall, is really only generated, as 

 a protective covering. ■ He also explained 

 the difference between the simplest vege- 

 table and animal forms, and stated that 

 the best guide for distinguishing them was 

 that given by Dr. Carpenter, depending up- 

 on " The nature of the aliment of the Proto- 

 phyta and Protozoa, and the method of 

 its introduction." The Prophyte absorbs 

 its nutriment from the air and moisture 

 surrounding it, the same as the highest 

 plants ; while the Protozoa, in common 

 with the highest animals, obtain their food 

 from organic substances, which are taken 

 up and then digested. 



Dr. Matthews had a live fish under his 

 large Crouch instrument, showing the 

 circulation. 



Exchanges. 



[Exchanges are inserted in this column without 

 charge. They will be strictly limited to mounted 

 objects, and material for mounting.] 



Living l/'ohwx globator, in any quantity, for moun- 

 ted Algae or other slides. 



J. M. ADAMS, Watertown, N. Y. 



Niagara River Filterina;s for mounted slides. 



H. POOLE, Buffalo, N. Y. 



Wanted — good gatherings of Diatoms, fossil or re- 

 cent, especially of test forms. Liberal exchange in fine 

 slides ; prepared or rough material. Lists exchanged. 



C. L. PETICOLAS, 635 8th Street, Richmond,Va. 



Section of Brain, stained, showing Tubercular Men- 

 ingites ; also Carcinoma Cerebri. Please send list. 

 L. BREWER HALL, M. D., 27 South i6th Street. 



Good, uncleaned Diatomaceous material containing 

 A rachnoidiscus^ Heliopelta., Pleurosigma^ Istkntia, 

 Triceratium., Siirirella. getnina and Terpsinooe 

 miisica wanted, in exchange for well-mounted slides 

 of arranged diatoms, etc., or cash. 



DANIEL G. FORT, Oswego, N. Y. 



Well-mounted Histological and Pathological slides, 

 in exchange for oi^^r first-class slides. 



LEWIS M. EASTMAN, M. D., 

 349 Lexington Street, Baltimore, Md. 



Well-mounted diatoms, in exchange for any vjell- 

 niounted slides or material, etc. 



W. H. CURTIS, Haverhill, Mass. 



For diatoms /» situ on Algae, send mounted slides. 

 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. 



Slides of hair of Tarantula., very curious ; also 

 crystalline deposits from urine, to exchange for well- 

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



log Cumberland St., Brooklyn, N. Y. 



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-class histological and 

 pathological slides, or other good specimens. 



J. L. WILLIAMS, North Vassalboro, Me. 



Well-mounted, typical Pathological and injected 

 Histological preparations, in exchange for other well- 

 mounted slides, Diatoms, Algae 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. 



