80 



THE AMEEICAN MONTHLY [April, 1880. 



was no question but that the rods and 

 cones of the vertebrate eye have been ori- 

 ginally derived from the crystalline cone 

 and nerve-rod of the arthropod eye. 



RETIEWS OF BOOKS. 



The Microscope and Microscopical Tech- 

 nology ; a text-book for Physicians 

 and Students. ByHEiNRiCH Frev, 

 Professor of Medicine in the Univer- 

 sity of Zurich. Translated and edited 

 by George R. Cutter, M.D. Illu- 

 strated by 383 engravings on wood. 

 Second edition. New York : WiUiam 

 Wood & Co. 1880. (Cloth, $6.oo.) 

 We have always regarded this book, in 

 its first edition, as one of the best works 

 on the microscope that medical students 

 or physicians could possess, but the second 

 edition is far better, in many respects ; the 

 work has been thoroughly revised, much 

 new matter and many new illustrations have 

 been added, a bolder-face type has been 

 used, and the size of the pages increased. 

 In the portion which treats of the 

 theory of the microscope, one might 

 reasonably expect to find the recent dis- 

 coveries of Prof. E. Abbe, of Jena, re- 

 counted with some care, but we have only 

 observed two or three brief allusions to 

 his work. The only truly scientific basis 

 for a complete theory of the microscope 

 has been laid by Prof. Abbe. 



Much good advice is given relative to 

 the selection and use of objectives, but 

 little or nothing is said about the capabi- 

 lities of the best lenses that have been 

 produced during the last three or four years. 

 We are pleased to notice that the 

 objectives of American makers have been 

 spoken of very highly, but we regret that 

 in the American edition, no American 

 stands are illustrated ; although many 

 German and French models are shown. 

 This, however, does not detract from the 

 intrinsic value of the work. 



The practical part of the book, that part 

 which relates to the work of the physician 

 and histologist, is excellent in every way. 

 The various processes of staining, inject- 

 ing, preparing and mounting are well 

 described, evidently by one who is practi- 

 cally familiar with them, and in treating of 

 special tissues or organs, the best methods 

 for their examination are given. 



The press-work is excellent, far superior 

 to what we usually find in scientific books 

 — or others for that matter, — and the 

 illustrations are all good. i 



Exchanges. 



[Exchanges are inserted in this column without 

 charge. They will be strictly limited to mounted 

 objects, and material for mounting.] 

 Polyzoa, Palates of MoUusca, 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, Lidianapolis, 

 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, 



2o8 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. 



Vanadate of Ammonia, (N H *) ^ V O *, Slides for 

 the Polariscope in exchange for other Slides. 



H. POOLE, Practical School, Buffalo, 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. 



Well-mounted, selected and arranged Diatoms, for 

 good histological, pathological or anatomical prepara- 

 tion. State what you have, and terms of exchange. 

 W. W. RINER, Greene, Iowa. 



Foraminifera from Sponge-sand, Marl-sand, and 

 Chalk ; Transparent Prisms of Carbonate of Lime 

 from fossil Shells ; Fresh and Salt Water Diatoma- 

 ceous material ; Carapaces of Rhizopods ; polished 

 sections of Fossiliferous Limestones, Corals, etc., to 

 exchange for any microscopical material. 



K. M. CUNNINGHAM, 

 Box 874, Mobile, Ala. 



The American Monthly Micro- 

 scopical Journal. 



Issued on or before the fifteenth 

 day of each month. 



Correspondence should be ad- 

 dressed to the Editor, Romyn Hitch- 

 cock, 53 Maiden Lane, New York. 



Terms : ^i.oo per year ; single 

 numbers, 15c. To foreign subscrib- 

 Qi^h, 6^ francs, or 5 shillings sterling. 



