240 



THE AMEEICAIST MONTHLY 



[Dec, 1880. 



those which have assumed the fern-leaf 

 form. They can be obtained from the 

 dealers in microscopes. 



MICROSCOPICA L SOCIETIES 



LIVERPOOL, ENG. 



Meeting held November 5th, Dr. Hicks, 

 the President, in the chair. 



Rev. Wm. Banister read a communica- 

 tion he had received from Mr. G. E. 

 Massee, of Scarbre, on certain Fungi. 

 Mr. Massee succeeded in growing spores 

 of Spiwiaria alba, and found that 

 threads of different kinds appeared on 

 two or three points of the surface of 

 the spore. One kind is of a very celluloid 

 character ; the other consists of oval cells 

 multiplying by generation until a torula- 

 like chain is formed which divides, be- 

 coming nucleated, each cell increasing 

 rapidly in size and remaining a resting- 

 spore for nearly a year, and not taking 

 any amoeba-like form. After this some 

 immature spumaria appeared in a pulpy, 

 homogeneous mass, in which were nu- 

 merous bright specks, each being a focus, 

 around which the plasma formed naked 

 cells of amoeboid character, or Plasmo- 

 dium. After three days all movement 

 ceased, the cells assumed a spherical 

 shape, a bright nucleus appeared, and with- 

 in twenty-four hours the cell wall was 

 absorbed, and the mature spirulose spores 

 set free. 



The paper of the evening was read by 

 F. T. Pane, Esq., F. R. C. S., on " The 

 Structure, Growth and Development of 

 Bone." 



A minute description was given of the 

 microscopical characters of bone, showing 

 it to consist of layers of hardened fibres 

 and bone-cells arranged in peculiar con- 

 centric circles called Haversian systems. 

 Blood-vessels occurred at intervals, but 

 the nourishing fluid was brought in inti- 

 mate contact with the tissue by means of 

 the bone-cells. Bone was classed as a 

 connective tissue, and its origin was 

 traced from the first appearance of this 

 tissue in the embryo to the formation of 

 membrane on one hand, and cartilage on 

 the other. 



Exchanges. 



[Exchanges are inserted in this column without 

 charge. They will be strictly limited to mounted 

 objects, and material for mounting.] 



For diatoms in situ on Algae, 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-class histological and 

 pathological slides, or other good specimens. 



J. L. WILLIAMS, North Vassalboro, Me. 



Slides of hair of Forantula, very curious ; also 

 crystalline deposits from urine, to exchange for well- 

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



109 Cumberland St., Brooklyn, N. Y. 



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. 



Diatomacese 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. 



I would like to have the address of some person 

 who has access to an abundance of Volvox globator, ^ 

 W. W. BUTTERFIELD, Indianapolis, Ind. 



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. 



Pleurosigmas and other unmounted Diatoms, both 

 Fresh Water and Marine ; also Marine Algae, Ferns, 

 and a large quantity of miscellaneous microscopical 

 material in exchange for good mounted objects. 



M. A. BOOTH, Longmeadow, Mass. 



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, 111. 



Nicely mounted Slides (opaque) of the Coal-tar 

 Derivatives, chemically prepared, crystalline in form, 

 showing their beautiful colors, in exchange for other 

 well-mounted material. Chemical name and formula 

 attached to each Slide. About a dozen varieties on 

 hand. F. L. BARDEEN, M.D., 



305^ Meigs street, Rochester, N.Y. 



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. 



