5 68 



THE POPULAR SCIENCE MONTHLY. 



A Junior Course of Practical Zoology. 

 By A. Milnes Marshall, M.D., F. R. S., 

 assisted by C. Herbert Hurst. London : 

 Smith, Elder & Co. For sale by G. P. 

 Putnam's Sons, New York. Pp. xxiv-440. 



This book is a laboratory manual de- 

 signed as a guide to a practical acquaint- 

 ance with the elements of animal morphol- 

 ogy. In almost all cases the descriptions of 

 animals are so arranged that the whole dis- 

 section can be performed on a single speci- 

 men. Strict uniformity of treatment has 

 not been specially aimed at ; thus the more 

 difficult portions of the subject are treated 

 at considerable length, while systems of 

 subordinate educational value, such as the 

 muscular, occupy little space. Few illus- 

 trations have been introduced lest the stu- 

 dent should give too little attention to the 

 drawings which he must make from his 

 own dissections. The animals selected for 

 description are amoeba, and three other 

 protozoa, hydra, liver-fluke, leech, earth- 

 worm, fresh-water mussel, edible snail, cray- 

 fish, cockroach, lancelet, dog-fish, rabbit, 

 fowl, and pigeon. 



Sanitary Examinations of Water, Air, 

 and Food. By Cornelius B. Fox, M. 

 D., F. R. C. P., London. With 1 10 Illus- 

 trations. Second edition. Philadelphia: 

 P. Blakiston, Son & Co. Pp. 563. Price, 

 $4. 



The reliability of Dr. Fox's sanitary 

 work led to the expansion of his pamphlet 

 on " Water Analysis " into a volume con- 

 taining sections on examinations of air and 

 food, in 1878, and has now brought this 

 volume to a second edition. The chief new 

 features of this edition are the extension 

 of water and air examination in the direction 

 of those biological methods that have been 

 introduced of late years, and that are deemed 

 by German and French sanitarians as im- 

 portant as the chemical analysis. Recently 

 devised improvements in the examination 

 of milk are also recorded. 



Due North : or Glimpses of Scandinavia 

 and Russia. By Maturin M. Ballou. 

 Boston : Ticknor & Co. Pp. 373. 



The author visited Copenhagen and El- 

 sinore, in Denmark, traveled over much of 

 Sweden and Norway, saw the midnight sun, 

 had a glimpse of Finland, visited St. Peters- 

 burg, Moscow, and Nijni-Novgorod, and 



spent a few days in Poland. His sketches 

 of all these parts include accounts of scen- 

 ery, buildings, people, customs, sites having 

 historical interest or interesting by personal 

 association, and observations on moral, so- 

 cial, political, and religious conditions. His 

 view of the Czar and his government is de- 

 cidedly more favorable than those which we 

 are accustomed to hear expressed. 



The True Doctrine of Orbits: An Origi- 

 nal Treatise on Central Forces. By 

 H. G. Rush, of New Danville, Pennsyl- 

 vania. Pp. 133. 



The author endeavors, by mathematical 

 demonstrations, to prove that the orbits of 

 the planets, and even of the comets, are 

 not elliptical, as the Newtonian astronomy 

 supposes, but circular. 



Report of the Proceedings of the Ameri- 

 can Historical Association. Third An- 

 nual Meeting, April 27-29, 1886. Her- 

 bert B. Adams, Secretary. New York : 

 G. P. Putnam's Sons. Pp. 104. Price, 

 $1. 



The membership of the Association has 

 grown since its organization in September, 

 1884, from forty to four hundred and twen- 

 ty-two members, seventy-eight of whom are 

 life-members. The third meeting was held 

 in Washington, and the discussions included 

 such topics as the capture of Washington 

 in 1814, and the campaigns of our late war, 

 besides many others of a more general char- 

 acter, and some bearing upon what used to 

 be called the philosophy of history. Among 

 the achievements claimed for this meeting 

 are the friendly reunion of military histo- 

 rians from the North and from the South ; 

 the peaceful discussion of the campaigns 

 before Washington, and in the Valley of 

 Virginia; the historical representation of 

 the new South and the Northwest, as well 

 as of the Northern States and Canada ; the 

 treatment of almost every branch of our 

 American history ; the meeting of the 

 youngest historians with the very oldest 

 Mr. Bancroft ; the mingling of representa- 

 tives from various historical schools ; and 

 the presence of Congressmen and visitors 

 from different parts of the Union. "It 

 was a veritable national convention, in the 

 political center of the United States, for the 

 furtherance of American history and of his- 

 tory in America." 



