no 



SCIENCE. 



[Vol. XVI. No. 394 



latter part of the season did considerable field work, and reports 

 upon a number of injurious species. Perhaps the most interesting 

 feature of his report is his work upon the enemies of the codling 

 moth in California. He has reared four entirely new parasites of 

 this species, two of which are primary and two secondary. The 

 egg parasite seems to be a very important feature in the life of the 

 codling moth on the Pacific coast, and we know from previous 

 experience with egg-parasites of the same genus that they are 

 capable of very rapid development, and are consequently very 

 beneficial insects where they attack injurious species. Professor 

 Bruner treats of the insects of the year, and enters upon the con- 

 sideration of insects detrimental to the growth of young trees on 

 tree claims in Nebraska and other portions of the West, an impor- 

 tant subject which has not before received treatment. 



— No. 13 of Blakiston's (Philadelphia) series of "Quiz-Com- 

 pends" has just been published. These compends are based on 

 popular text-books and the lectures of prominent professors, and 

 are kept constantly revised, so that they represent the present 

 state of the subjects upon which they treat. The one now before 

 us. No. 13, "A Compend of Equine Anatomy and Physiology," 

 by Professor William R. Ballou. supplies for students of veterinary 

 anatomy and physiology a work which will answer their needs 

 not only as a text- book, but also for work in the dissecting-room. 

 In its preparation the standard work of Chauveaii has been fol- 

 lowed in the main, though the works of Strangeways, Gray, and 

 Quain have also been consulted. The work is illustrated with 

 twenty nine engravings, selected for the purpose from Chauveau's 

 " Comparative Anatomy." 



— Bulletin No. 24, from the Agricultural Experiment Station, 

 Madison, Wis., is entitled "A New Method for the Estimation of 

 Fat in Milk, Especially Adapted to Creameries and Cheese Facto- 

 ries." Dr. S. M. Babcock, chemist of the station, has devised a 

 method for determining the amount of fat in milk, which appears 

 to be simple, economical, and accurate. Briefly described the 

 method is as follows. A carefully measured sample of milk is 



placed in a test bottle having a long narrow neck. Next, an equal 

 volume of sulphuric acid is added , and the bottle is placed in a wheel, 

 which is revolved horizontally from six hundred to eight hundred 

 times per minute, for about six minutes. At the end of this time 

 the fat of the milk set free by the acid has risen to the top of the 

 liquid. Hot water is then poured into the bottle, partly filling 

 the neck. Upon again whirling for a couple of minutes the fat 

 will rise through the water into the neck, in a long column, where 

 it is easily read off by graduations on the neck. By this method 

 the fat in skim milk, buttermilk, whey, cream, and even cheese 

 can be determined. 



— Messrs. Ginn & Co. have published " The Nine Worlds," by 

 Mary E. Litchfield, being stories from the Norse mythology. The 

 stories are based upon the Eddas, but the authoress has also relied 

 much upon the best German and other authorities. Unfortu- 

 nately, she has, as she admits in her preface, drawn largely upon 

 her own imagination, the first story in the book having no foun- 

 dation except a few lines of poetry, which really do not support it 

 at all. Hence, though she lells us much about the mythology of 

 the Norsemen, her book cannot be relied upon as an authority. 

 The leading character in most of the myths is Loki, the spirit of 

 evil, while Odin, Thor, and various other gods and giants, are 

 brought prominently forward. The slaying of Baldur, who rep- 

 resents the summer sun, and the carrying off of Iduna, the god- 

 dess of spring, are among the most interesting myths. Miss 

 Litchfield gives in an introduction an account of the Norse cos- 

 mology, and in an appendix a glossary of the names and attri- 

 butes of the various gods and other personages. The book will 

 interest those who like tales of the marvellous, and will impart 

 some general information about the Norse mythology. 



— The " Summary of the Seventh Annual Report of the Bureau 

 of Statistics of Labor of the State of New York" contains matter 

 of interest to economists. It is devoted to an account of the vari- 

 ous strikes, lock-outs, and boycotts that have occuiTed in the State 

 during the past five years, with statistical tables showing the 



ed at Edito 

 -Aug. 9. 



American Association for the AdTancement of 

 Science, Proceedings of, Thirty-eighth Meeting, 

 August, 1889. Salem, Permanent Secretary. 

 4% p. 8°. 



Annual Report of the Chief Signal OfBcer of the 

 Army to the Secretary of War, for the year 1889. 

 Parts I and II. Washington, Government, 

 389 + 165 p. S". 



Annual Report of the Department of Mines of New 

 South Wales, 1889. Sydney, Government. 263 p. 

 f°. 



BONTAN, John. Pilgrim's Progress. (Classics for 

 Children.) Ed. by D. H. Montgomery. Boston, 

 Ginn. 110 p. 12°. 35 cents. 



Hardy, A. S. Elements of the Differential and In- 

 tegral Calculus. Boston, Ginn. 239 p. 8'. SI. 65. 



International Marine Conference, 1889, Proceed- 

 ings of. Vols. I, II, and III. Washington, Gov- 

 ernment. 814 -f 680 -f 602 p. 8°. 



Miami Horticulturist. Vol.1. No. 1. m. Bradford, 

 Ohio, M. Cassel. 8 p. 4°, 25 cents per year. 



Montgomery, D, H. Leading Facts of American 

 History. Boston, Ginn. 412 p. 12°, gl.lO. 



MuLLER, P, Max. Three Lectures on the Science of 

 Language, Chicago, Open Court Publ, Co. 112 

 p. 8°. 75 cents. 



TBIJRD EDITION. 



THE FAULTS OF SPEECH 



A. MELVILLE BELL, 



Author of " Visible Speech," etc., etc. 



The Faults of Speech is a Self -Corrector 

 and Teacher's Manual, for the removal of all 

 Impediments and Defects of Articulation. 



*jf* Sent postjiaid on receipt of price, 



N. D. C. HODGES, 47 Lafayette Place, 



NEW YORK. 



PRACTICAL 



ELECTRICAL NOTES 



AND DEFINITIONS. 



For the use of engineering students and practical 

 men by W. P. Maycock. together with Rules and 

 Regulations to be observed in Electrical Installation 

 Work, with diagrams. 130 pages, 32mo, cloth, 60 cts. 

 E. & F. N. SPON, 12 Cortlandt St., New York. 



HE AVESf AWU HELl,. 416 p., paper. 

 OIVIKE l,OVE A]\'D WISDOM. 



383 p., paper. By Emanuel Swedenborg. 

 Mailed, prepaid, for 14 cents each (or 25 

 cents for both) , by the American Swedenborg 

 P. and P. Society, 20 Cooper Union, N.Y. City. 



THE WINNIPEG COUNTRY; 



ROUGHIKG IT WITH AN ECLIPSE PARTY. 



BY 

 A. ROCHESTER FELliOW. 



(S. H. SCUDDEB.) 



With thirty-two Illustrations and a Map. 

 12-^. $1.50. 



"The story is a piquant, good-humored, entertain- 

 ing narrative of a canoe voyage A neater, prettier 

 book Is seldom seen." — Literary World. 



"This is a sprightly narrative of personal inci- 

 dent. The book will be a pleasant reminder to 

 many of rough experiences on a frontier which is 

 rapidly receding." — Boston Transcript. 



" The picture of our desolate North-western terri- 

 tory twenty-five years ago, in contrast with its 

 civilized aspect to-day, and the pleasant features of 

 the writer''s stjle, constitute the claims of his little 

 book to present attention.'"— r?i.e Dial. 



N. D. C. HODGES, Publisher, 



47 Laj'atette Place, New York. 



BOOKS: How to ^et them. If there is any 

 book or pamphlet that you want, write to the Science 

 Book Agency, 47 Lafayette Place, New York. 



D. APPLETON & CO. 



Publish 



I. 



Vo'ume 67 of the Liternational Sc entific Series, 



THE COLOURS OF ANIMALS: 



THEIR MEANING AND USE. 



Especially considered in the Case op Insects. 



By EDWAED BAGNALL PODLTON, F.R.S, 



With Chrc 

 Figures i 



no-lithographic Frontispie 

 1 Text. i2mo, cloth. Pric( 



e and 66 

 , $1-75- 



" Mr. Poulton is to be congratulated on having 

 produced so readable and suggestive a volume on 

 one of the most attractive departmf^:,nts of natural 

 history, and on having by his own researches con- 

 tributed so largely to the solution of some of the 

 more interesting problems which it presents." — 

 Alfred R. Wallace, in Nature. 



DRAGON-FLIES vs. MOSQUITOES. 



CAN THE MOSQUITO BE EXTERMINATED? 



THE LAMBORN PRIZE ESSAYS, 



BY WORKING ENTOMOLOGISTS. 



8vo, cloth. Illustrated. $1.50. 



This book embodies the results of a scientific study 

 of the mosquito nuisance. For the first time scien- 

 tists have undertaken a careful, practical investiga- 

 tion of this question, and their reports show how 

 the mosquito pest may be mitigated. 



D. APPLETON & CO,, Publishers, 



1, 3, & 5 Bond Street, New York. 



