January 5, 1894. ] 
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 comeon it suddenly, 
over the bank, it will utter a cry and flop into the 
water and wade or swim off. Iam getting fond of see- 
ing it simulate an inanimate thing. 
Frep MarHer. 
Cold Spring Harbor, N. Y. 
BOOK-REVIEWS. 
Handbook of Public Health and Demography. By Evwarp 
F. Wittoucusy, M.D., Lond. 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, 1884 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,’ ‘‘Water 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 
‘““Meteorology,” another on ‘‘Sanitary Law,” and an 
SCIENCE. 
13 
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. Wedo not refer to the “‘sanitary 
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 lighting, and in treat- 
ing this all-important section the author has given us 
the benefit of such authorities as Professors Cohn and 
Férster, of Breslau, the eminent oculists. How im- 
portant this subject is at once comes home to one when 
we temember 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. 
EXCHANGES. 
[Free of charge to all, if 
Address N. D. C. 
York ] 
Brain 
Hodges, 874 Broadway, New 
Wants. 
of satisfactory character. 
anted.—Sachs’s Text-book of Botany, 2nd Eng- 
lish edition. Dr. Alfred C. Stokes, 527 Mon- 
Workers. 
mouth Street, Trenton, New Jersey. 
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 
Rumford Chemical Works, 
Providence, R. I. 
Beware of Substitutes and Imitations. 
For sale by all Druggists. 
For Sale or Exchange.—A large number of state 
and general government scientific reports, Smith- 
sonian contributions and Bulletins Torrey Club, 
Botanical Gazette and many others. These were 
obtained in the purchase of a large scientific 
library and are duplicates. Write for what you 
want and offerany sum. Mexican Boundary Sur- 
vey, Torrey’s Botany California, Blume’s Orchids 
of India and Japan, and Hooker’s Rododendrons 
of the Sikkim-Himalaya are in the lot. What 
offers? R. Ellsworth Call, Louisville, Ky. 
Skins, with full data, of A®gialites nivosa, 
Ereunetes occidentalis, Ammodramus_ beldingi, 
A. rostratus, Chamzea fasciata henshawi and others 
from California, for native or foreign skins with 
full data. A. W. Anthony, 2042 Albatross Street, 
San Diego, California. 
For Sale.—An entirely new analytical balance, 
made by one of the most celebrated manufacturers; 
Capacity 100 grammes, sensitive to one-twentieth 
amilligramme. Never been used. Regular price, 
$83. Will sell for $50 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- 
ndence solicited. Address Henry L. Osborn, 
iO 
Biolowical Laboratory of Hamline University, St. 
Paul, Minnesota. 
For Sale.—Small collection of fine first-class sets of 
birds’ eggs; single breech-loading shotgun, gold- 
filled hunting-case watch and telescope. Write for 
ANTED to exchange for human bones or re- 
cent medical text—books, the following books 
“Metallurgy of Silver,” M. Eissler, 1889; ‘Practical 
Treatise on Petroleum,” by Benj. J. Crewe, 1887; 
“Cook’s Chemical Philosophy,’ 1885; ‘Cairn’s 
|Chemical Analysis,’’ 1880; ‘‘Wagner’s Chemical 
|Technology,” by Crookes, 1886; ‘‘Fresemier’s Qual. 
Chem. Analysis,” 1879; ‘Elementary Treatise on 
Practical Chemistry and Qual. Analysis. ’—Clowes, 
1881; bound Vols. 1 to 12 of Dr. Lardner’s ‘Museum 
of Sei e and Art” (very rare), 1854; back numbers 
of “Electrical World,” beautiful specimens of 
Pyrite Incrustations from Cretaceous of New Jer- 
sey; Magnetis Iron Ore, Highly Polarized. Address 
|D. 1. Marshall, Metuchen, N. J. 
VV ANDED = Books or information on the micro- 
scopical determination of blood and hair. Also 
reports of cases where hair has played an import- 
ant part in the identification of an individual. Ad- 
dress Maurice Reiker, 206 N. First Ave., Marshall- 
twn, Iowa. 
A GEOLOGIST thoroughly conversant with the 
geology of the Southern States desires an en- 
gagement. Has complete knowledge of the eco- 
nomic geology of Iron, Coal, Lignite, as well as 
Clay and Kaolin. Five years’ experience with 
Geological Surveys. Address K., 509 West Sixth 
Street, Austin, Texas. 
ANTED.—Tuckerman’s Geneva Lichenum and 
Carpenter on the Microscope, Wiley’s In- 
troduction to the Study of Lichens. State price 
anes eggs and particulars. B.S. Bowdish, Phelps, 
and other particulars. Richard Lees, Brampton, 
nt, 
