POPULAR MISCELLANY. 



279 



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Food of Man. By Dr. E. L. Sturtevant. From 

 the " Report of the Secretary of Connecticut 

 Board of Agriculture." 1880. Pp.41. 



Muscle-Beating for Healthy and Unhealthy 

 People. By M Kteram. Illustrated. New York: 

 M. L. Holbrook & Co. 1879. Pp. 56. 30 cents. 



The Problems of Insanity. A Paper read be- 

 fore the New York Medico-Legal Society, March 

 3, 1880. By George M. Beard, M. D. Pp. 24. 



Proverbial Treasury. English and Select 

 Foreign Proverbs from Fifty-one Different An- 

 cient "and Modern Languages. By Carl Sael- 

 bach. New York : Seelbach Bros. 1880. No. I., 

 containing 4,903 Proverbs. 50 cents. 



Actual Measures of the Great Pyramid of 

 Egypt, disclosing the Architectural System em- 

 ployed. International Institute for preserving 

 and perfecting Weights aud Measures. Toledo 

 Blade Printing Co. "1880. Pp. 19. 



Studies from the Biological Laboratory of 

 the Johns Hopkins University. No. 1, Session 

 1877-73. No. -'. Session 1873-'V9. Edited by II. 

 N. Martin, M. A., D. Sc., Professor of Biology. 

 No. 3, Chesapeake Zoological Laboratory. Sci- 

 entific Results of the Session of 1878. Edited by 

 Professor W. K. Brooks, Associate in Biology. 

 1379. No. 4, Development of the Oyster. By 

 W. K. Brooks. Baltimore : John Murphy & Co. 

 1880. $1 each. 



Camps and Tramps in the Adirondacks, and 

 Grayling Fishing in Northern Michigan. A Rec- 

 ord "of "Summer Vacations in the Wilderness. 

 By A. J. Noithrup. Svracuse, N. Y. : Davis, 

 Bardeen & Co. 1880. Pp. 302. $1.25. 



Dwelliug-Houses : Their Sanitary Construe 

 tion and Arrangement. By Professor W. H. Cor- 

 field, M. A.. M. D. New Y'ork: D. Van Nos- 

 trand. 1380. Pp. 155. 50 cents. 



A Series of Questions in English and Ameri- 

 can Literature. Prepared by Mary F. Hendrick. 

 Syracuse. N. Y. : Davis, Bardeen & Co. 1880. 

 Pp. 76. 35 cent-. 



Sea-Air and Sea-Bathing. B? John H. Pack- 

 ard, M. D. Philadelphia: Presley B.akiston. 

 1880. Pp. 124. 50 cents. 



Posfc-Mortem Examinations. By Professor 

 Rudolph Virchow. Translated from the sec- 

 ond German edition. By Dr. T. P. Smith. Phil- 

 adelphia: Presley Blakiston. 1880. Pp. 145. 

 $1.25. 



Common Mind-Troubles and the Secret of a 

 Clear Head. By J. Mortimer-Granville. M. D., 

 etc Edited, with Additions, by an American 

 Physician. Philadelphia : D. G. Brinton. 1880. 

 Pp. 185. $1. 



The Hair: Its Growth, Care, Diseases, and 

 Treatment. By C. Henri Leonard, M. A., M. D. 

 Detroit: C.Henri Leonard. 1880. Pp.316. $2. 

 Free Land and Free Trade. By Samuel S. 

 Cox. New York : G. P. Putnam's Sons. 1880. 

 Pp.126. $1.25. 



Radical Mechanics of Animal Locomotion. 

 By William P. Wainwright. New York: D. Van 

 Nostrand. 1880. Pp. 294. $1.50. 



Silver in its Relation to Industry and Trade. 

 Bv William Brown. Montreal: Lovell Printing 

 Co. 1880. Pp. 134. 60 cents. 



Life: Its True Genesis. By R. W. Wright. 

 New Y'ork: G. P. PutnamVSons. 1880. Pp. 

 298. $1.50. 



* Practical Keramics for Students. By C. A. 

 Jannier. New York: Henry Holt & Co. 1880. 

 Pp. 258. $2.50. 



A Guide to Modern English History. By Wil- 

 liam Cory. Part I., 1815 to 1830. New Y'ork : 

 Henry Holt & Co. 1880. Pp. 276. $2. 



Schiller's Complete Works. Edited, with Care- 

 ful Revisionsand New Translations, by Charles 

 J. Hempel, M. D. In Two Volumes, with Illus- 

 trations by the Best German Artists. Philadel- 

 phia : G. Kohler. 1879. Cloth, 



POPULAR MISCELLANY. 



Climate and Complexion. Correction. 



Messrs. Editors : I notice that in my article 

 on " Climate and Complexion," published in 

 your May number, I have, either in so many 

 words or inferentially, made the statements 

 that a dark pigment reflects the rays of light 

 and heat better, and that it is a greater ob- 

 stacle to their transmission than a light one. 

 These, of course, as they stand, are quite 

 wrong. What I should have said is, that a 

 cuticle containing a dark pigment is less 

 permeable by heat and light, because it is 

 thicker and more opaque. For some rea- 

 son, which I do not undertake to explain, 

 the coloring matter of the skin, when abun- 

 dant, is darker than when scanty. Hence, 

 a cuticle containing a dark pigment is less 

 transparent. And because abundance and 

 consequent blackness of the pigment imply 

 thickness of the cuticle, a dark cuticle does 

 not transmit heat so readily as a light one. 



J. M. BUCHAN. 

 Barbie, Ontaeio, Canada, 21<nj 3, 1880. 



Summer Schools of Natural History. 



We received, too late for insertion in our 

 May number, the announcement of this sum- 

 mer's session of the Chesapeake Zoological 

 Laboratory, which was to open April 22d at 

 Beaufort, North Carolina, and continue until 

 the 1st of September, under the direction of 

 W. K. Brooks, Assistant Professor of Zo- 

 ology and Comparative Anatomy in Johns 

 Hopkins University. The house to be used 

 as a laboratory is near the water, and the 

 equipment includes boats, nets, dredges, 

 aquaria, books, microscopes, and all the ne- 

 cessary appliances for collecting and study- 

 ing marine animals and plants, and a steam- 

 launch for dredging and surface collecting. 



The fifth session of the Summer School 

 of Biology at Salem, Massachusetts, will be 

 held at the museum of the Pcabody Acad- 

 emy of Science, Salem, under the direction 

 of Professor Edward S. Morse. Professor 

 George L. Goodale has kindly consented to 

 give six lectures on physiological botany. 

 The other instructors are Mr. John Robin- 

 son, cryptogamic botany ; Mr. John H. Sears, 

 analytical botany ; Professor H. II. Straight, 

 anatomy and physiology of the vertebrates ; 



