January 5, 1894.] 



SCIENCE. 



13 



feet of it and walk all around it, and the bird will not 

 betray a sign of life, even by winking. This I do 

 several times a week, but, if I come on it suddenly, 

 over the bank, it will utter a cry and flop into the 

 water and wade or swim off. I am getting fond of see- 

 ing it simulate an inanimate thing. 



Fred Mather. 



Cold Spring- Harbor, N. Y. 



BOOK-REVIEWS. 



Handbook of Public Health and Demograpliy. By Edward 

 F. WiLLOUGHBY, M.D., Loud. London and New 

 York, Macmillan & Co. 509 p., 1893. $1.50. 

 Though appearing for the first time under the pre- 

 sent title, this is, in fact, a third edition, greatly en- 

 larged andimproved, of the "Principles of Hygiene, "pub- 

 lished in London, 1S84 and 1888. To this latest edition 

 several important chapters have been added, as, for 

 instance, those on "Vital Statistics," "Sewage Dis-- 

 posal," "Unhealthy Trades," and "Sanitary Law," 

 while some other matter entirely irrelevant to the sub- 

 ject in hand has been omitted. The author, as stated 

 in his preface, has endeavored throughout so to combine 

 scientific accuracy with the popular treatment of per- 

 sonal health and social problems as to render the work 

 a clear and comprehensive manual of the principles and 

 practice of public health, equally adapted to the pur- 

 poses of the medical man, the student, the teacher and 

 the general reader. Hygiene is treated under the 

 general heads of " Health of the Man," "Health of 

 the House," "Health of the City" and "Health of the 

 People," with sub-divisions into sections on "Dietetics," 

 "Clothing," "Exercise," "Air, Warmth and Light," 

 "General Sanitary Arrangements," "AVater Supply," 

 "School Hygiene," "Preventable Diseases," etc. The 

 remaining chapters include an admirable treatise 

 on "Demography," in which many common errors, 

 statistical and otherwise, are exposed; a chapter on 

 "Meteorolooy," another on "Sanitary Law," and an 



appendix of tables, etc. These various subjects are 

 discussed so thoroughly and are so comprehensive that 

 we are provided with a most excellent book of refer- 

 ence in all matters pertaining to hygiene. 



Particularly noteworthy are the sections on "Die- 

 tetics" and those dealing with "House Drainage and 

 Sanitation," and also that which discusses the neg- 

 lected question of " School Hygiene." We say 

 neglected, for even in the face of modern enlighten- 

 ment on these subjects many, if not most, of our school 

 buildings continue on the same general lines of the last 

 generation, remodelled only so far as to gain a greater 

 seating capacity. We do not refer to the "sknitary 

 arrangements" of the plumber; the school building is 

 always a favorite place for costly experiments in that 

 direction, but rather to the heating, ventilating, school 

 desks and seats, etc. One defect which is probably the 



• last thought of in school building, and yet the surest in 

 its evil effects, is that of school hghting, and in treat- 

 ing this all-important section the author has given us 

 the benefit of such authorities as Professors Cohn and 

 Forster, of Breslau, the eminent oculists. How im- 



. portant this subject is at once comes home to one when 

 we remember the alarming increase of weak eyes 

 among school children, the headaches, and the so often 

 repeated complaint that "It hurts my eyes to look at 

 the black-board." The chapter on "Dietetics" em- 

 braces a discussion of food stuffs, the classification and 

 uses of food, the relative values of the common foods, 

 their proper preparation and the adulterations which 

 they may contain. It will be seen that the subject 

 matter is most general, and embraces practically all 

 that is of moment in sanitary matters, while, moreover, 

 the arrangement and treatment are most admirably 

 suited for convenient reference. Methods of hygienic 

 chemical analysis are given in so far as is deemed 

 necessary, and these sections will prove particularly 

 valuable as an aid to the interpretation of results ob- 

 tained through an expert chemist. 



Brain 



i^ers. 



Horsford's Acid Phosphate 



is recommended by physicians of all 

 schools, for restoring brain force or 

 nervous energy, in all cases where 

 the nervous system has been re- 

 duced below the normal standard 

 by over-work, as found in lawyers, 

 teachers, students and brain-workers 

 generally. 



Descriptive pamphlet free on application to 



Riimford Clieinical Works, 



Providence, K. I. 



Beware of Substitutes and Imitations. 



For sale by all Druggists. 



[Free of charge to all, if of satisfactory character. 

 Address N. D. C. Hodges, 874 Broadway, New 

 York ] 



For Sale or Exchange. — A large number of state 

 and .general government scientiflo reports, Smith- 

 sonian contributions and Bulletins Torrey Club, 

 Botanical Gazette and many others. These were 

 obtained in the purchase of a large scientific 

 librt.ry and are duplicates. Write for what you 

 want and oi?rr any sum. Mexican Boundary Sur- 

 vey, Torrev's Botany California, Blume's Orchid 

 of India and Ji.pan, and Hooker's Rododendr.n 

 of the Sikkim-Himalava are in the lot. What 

 offers? R. Ellsworth Call, Louisville, Ky. 



Skins, with full data, 

 Ereunetes occidentalis, 

 A. rostratus, ChamEea fas 

 from California, for nati\ 

 full data. A. W. Antho 

 San Diego, California. 



of ^Egialiles niv. 

 mmodramus beldii _ 

 Lta henshawi and others 

 or foreign skins with 

 , 2042 Albatross Street, 



For Sale, — An entirely new analytical balance, 

 made by one of the most celebrated manufacturers; 

 capacity 100 grammes, sensitive to one-twentieth 

 a milligramme. Never been used. Regular price, 

 J83. Will sell for S50 cash. Address, A. P. Nichols, 

 41 Summer Street, Haverhill, Mass. 



Museum of Hamline University desires to exchange 

 Marine Shells, preserved alcoholic material of ma- 

 rine zoology, or microscopic slides for zoological 

 specimens from southern and western United 

 States, especially for rodents in the flesh. Corres- 



Snndence solicited. Address Henry L. Osborn, 

 iological Laboratory of Hamline University, St. 

 Paul, Minnesota. 



For Sale.— Small collection of fine first-class sets of 

 birds' eggs; single breech-loadmg shotgun, gold- 

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 list of eggs and particulars. B. S. Bowdish, Phelps, 

 N, Y. 



w 



anted.— Sachs's Text-book of Botany, 2nd Eng- 

 lish edition. Dr. Alfred C. Stokes, 527 Mon- 

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\A/ANTED to exchange for human bones or re- 

 ''' cent medical text-books, the following books 

 "Metallurgy of Silver," M. Eissler, i8Sg; "Practical 

 Treatise on Petroleum," by Benj. J. Crewe, 1887; 



lok's Chemical Philosophy," 1885; "Cairn's 

 Chemical Analysis," iSSo; "Wagner's Chemical 



hnology," by Crookes, 1886; "Fresemier's Qual. 



m. Analysis," i«7g; "Elementary Treatise on 

 Practical Chemistry and Qual. Analysis. '—Clowes, 



; bound Vols. 1 to 12 of Dr. Lardner's "iWuseum 

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 of "Electrical World," beautiful specimens of 

 Pyrite Incrustations from Cretaceous of New ler- 

 sey; Magnetis Iron Ore, Highly Polarized. Address 

 D. T. Marshall, Metucnen, N. J. 



U/ ANTED. —Books or information on the micro- 

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 reports of cases where hair has played an import- 

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A GEOLOGIST thoroughly conversant with the 

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 )logical Surveys. Address K., 509 West Si.\th 

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\X/ANTED.— Tuckerman's Geneva Lichenum and 

 '' Carpenter on the Microscope, Wiley's In- 

 troduction to the Study of Lichens. State price 

 and other particulars. Richard Lees, Brampton, 

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