November 25, 1892.] 



SCIENCE. 



307 



explained. Chapter V. treats of the solution of trigonometrical 

 equations. Then the formulee for the solution of right and oblique 

 triangles are given in full, and a lot of tlieorems on inscribed and 

 escribed circles with a large number of exercises. Finally, on 

 page 166, the first right triangle is solved, by logarithms of course ! 

 Then follow the other cases in the solution of triangles. 



The last two chapters of the plane trigonometry treat very 

 properly of the construction of trigonometric tables and L)e 

 Moivre's theorem. In a foot-note, De Moivre is called a French 

 geometer. It is true he was born in France, but he should rather 

 be styled an English mathematician. In another note (page 91), 

 speaking of theNaperian system, the author says it is so called from 

 the inventor. Baron Napier. He should have said it is so called 

 in honor of the inventor of logarithms. He gives the date of the 

 introduction of Briggsian logarithms as 1615. They were sug- 

 gested to Briggs in 1615, or about that time, but they could not be 

 said to have been introduced until two years later. It is odd that 

 in such a small number of historical references the author should 

 have contrived to make so many mistakes. He calls aic sin, 

 etc., the French, when he might have described it as the conti- 

 nental notation. Referring to addition and subtraction logarithms, 

 he names only J. Zech, Berlin, as compiler of such tables. One 

 would expect reference to Gauss, if to any one. There are numer- 

 ous minor points which are quite worthy of commendation, but, 

 on the whole, in the writer's opinion, the trigonometry is not 

 nearly as satisfactory as other volumes in the series. 



AMONG THE PUBLISHERS. 



The Open Court Publishing Co. will issue for the holidays 

 " Truth in Fiction, Twelve Tales with a Moral," by Paul Cams. 



— Besides the serials which begin in the November and Decem- 

 ber numbers of the magazine, The Century has in preparation for 

 the ensuing year many other important features, only a few of 



which can be mentioned here. " Good Roads" will be one of the- 

 sub.iects, the important matters of street-paving and railroad- 

 crossings being treated by men well qualified to discuss the ques- 

 tions. Papers on educational institutions and methods in America 

 are in preparation. 



— The December Atlantic will contain a description of being 

 ''Alone on Chocoruaat Night," by Frank Bolles, author of "Land 

 of the Lingering Snow." 



— A semi-centenarian: America's venerable and only weekly 

 eclectic. LitteU's Living Age. This standard weekly is the oldest 

 concentration of choice periodical literature printed in this coun- 

 try. It holds a unique position in the magazine world — a 

 monthly that comes every week — a single magazine that contains, 

 the cream of ail. Those who desire a thorough compendium of 

 all that is admirable and noteworthy in the literary world will he 

 spared the trouble of wading through the sea of reviews and 

 magazines published abroad; for they will find the essence of all 

 compacted and concentrated here. Its prospectus for 1893 pre- 

 sents some special attractions and is well worth attention in 

 selecting one's reading-matter for the new year. 



— With the number for November, 1892, The Century Magazine 

 began a new volume. In November is also given the first instal- 

 ment of '■ The Letters of Two Brothers." This series consists of 

 extracts from letters which passed between the late General Sher- 

 man and his brother. Senator Sherman, at critical periods in 

 American History, and are edited by General Sherman's daughter. 

 Other serials beginning in this number are on "Science and the 

 Bible;" the first paper, "Does the Bible Contain Scientific 

 Errors?" being by Professor Shields of Princeton; to be followed 

 by ''The Effect of Scientific Study upon Religious Beliefs." The- 

 December Century will be a thorough-going Christmas number, 

 full of Christmas stories, Christmas poems, etc., and with many 

 full-page and other illustrations. 



JJffspepsia 



Dr. T. H. Andrews, Jefferson 

 Medical College, Philadelphia, says of 



Horsford's Acid Phosphate. 



*'A wonderful remedy which gave me 

 most gratifying results in the worst 

 forms of dyspepsia." 



It reaches various forms of 

 Dyspepsia that no other medi- 

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 the weakened stomach, and 

 making the process of diges- 

 tion natural and easy. 



Descriptive pamphlet free on application to 

 Rumlord Chemical Works. Providence, R. I. 



Beware of Substitutes and Imitations. 



For sale by all Druggists. 



Exchanges. 

 [Freeofcharge to all, if of satisfactory character. 



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



For sale or exchange. — A Stevens' new model 

 pocket shot-gun, 44 cal., with 22-cal. rifle barrel. 

 Just the thing for collecting birds and small mam- 

 mals. Will exchange for a 22-cal. cane-gun or good 

 books on ornithology. Write for particulars, stat- 

 ing what you have for exchange. R. C. McGREGOR, 

 2841 Champa st., Denver, Col. 



For sale.— A very fine stone sword (?) so named 

 by myself. It is perfect— 15 inches in length, a little 

 over 2 inches in width, and J^ inch thick. It is of a 

 dark slate color, perhaps limestone, and is the 

 largest implement of the kind known. Some fifteen 

 years ago, when it was not mine, I was offered S40 

 for it; since that time it has come into my posses- 

 sion; that price will now buy it. Address Rev. C. 

 FOSTER WILLIAMS, Ashwood, Tenn. 



For exchange. — Fine specimens of Wis. fresh- 

 water pearls. I want books or papers on marine 

 and fresh-water aig«; also classified specimens of 

 same. I will exchange for Smithsonian reports or 

 crystallized minerals, D. M. ANDREWS, Dodge 

 Centre, Minn. 



For Sale or Exchange.— The undersigned has a 

 lot of flrst-class duplicate bird''s skins and sets of 

 eges, both rare and common, for sale or acceptable 

 exchange. Also about two hundred second class 

 skins and five hundred eggs, suitable for study 

 specimens, at very low figures. The latter, for 

 starting a collection, are as good as the best, em- 

 bracing all classes and nearly all families. Also 

 about forty species of fossils, principall'^ De- 

 vonian. MORRIS uIBBS, M.D., Kalamazoo. Mich. 



For Exchange—" The Birds of Kansas,"— Goss, for 

 Gray's Anatomy, or Medical Dictionary. Must be 

 in good condition. Address, J. H. SIMPSON, Buch- 

 tel College, Akron, Ohio. 



Wants. 



A POSITION is desired in the South, preferablr 

 the Gulf States, where I can teach the sciences. 

 Can also iLstruct in other branches. Salary only 

 nominal, as I am simply desirous of employment 

 while spending the winter in the South. A private 

 family preferred, but will acce >t regular school 

 work if not too confining. MORRIS GIBBS, M.D,, 

 Kalamazoo, Mich, 



WANTED.— By well - qualified and experienced 

 science master and associate of the Royal 

 School of Mines, London, aged 26 (at present in 

 Eogland), a mastership in technical college or uni- 

 versity for any of the following subjects: Engineer- 

 ing sciences, geology and mineralogy, physics, chem- 

 istry and metallurgy, etc., etc. Can provide excel- 

 lent references and credentials. Apply, J. G., 17 

 Sussex St., Rochdale, England. 



METALLORGICAL CHEMIST will give instruc- 

 tion in the metallurgy and chemical analysis 

 of iron and steel. Complete or special courses ap- 

 plying to the manufacture of pig irons and steels, as 

 well as to their uses. Address "METALLURGIST,'' 

 care Science. 



AGRADOATE of the University of Pennsylvania 

 and a practical mineralogist of twenty years' 

 experience desires to give his services and a cabi- 

 net of 25, t 00 specimens, all named, with about th© 

 same number of duplicates, in minerals, crystals, 

 rocks, gems, fossils, shells, archaeological and ethno- 

 logical specimens and woods to any institution de- 

 siring a fine outfit for study. The owner will in- 

 crease the cabinet to 5O,O;.)0 specimens in two years- 

 and will act as curator. Correspondence solicited 

 from any scientific institution. J. W. Hortter, 

 M.D., Ph.D., San Francisco, Cal., General P. O. 

 Delivery. 



CHEMIST AND ENGINEER, graduate Germaa 

 Polytechnic, Organic and Analytical, desires a 

 position in laboratory or chemical works. Address 

 213i^ E. 7th Street, New York, care Levy. 



The American Geologist for 1893. 



Edited by Prop. S. Calvin. University of Iowa; Dr. E. W. Claypole, Buchtel College; John Eteruan, 

 Lafayette College; Dr. Persifor Frazer, Penu Hort. Soc; Prof F. W. Cragin. Colorado College; 

 Prof Rob't T. Hill, U. S. Irrigation Survey; Dr Andrew C. Lawson. University of California; Frank 

 D Knowlton, U. h. National Museum; Joseph B. Tvhrsll, Geol. Sur.of Canada; E. O. Ulrich. Minnesota 

 Geological Survey; Prop. I. C. White, University of West Virginia; Prof. N. H. Winchell, University 

 of Minnesota. Now in its Xth volume. %Z 50 per year. Sample copies, 20 cents. Address 



THE geological PUBLISHING CO., MinneapoUs, Minn. 



