December 23, 1892.] 



SCIENCE. 



565 



Rae on John "Wilkes, Dr. Buchan on Wind, and Mr. Price Hughes 

 on Wesley. Canon Isaac Taylor contributes the articles on Writ- 

 ing and on York and Yorkshire, and Cavendish that on Whist. 

 Dr. Mills expounds Zend, and Mr. G. Snintsbury criticises Zola. 

 The tirjt rolume of the new edition was issued in March, 1888, so 

 that the nork has been completed in less than five years — a very 

 short time imleed wlien its magnitude is considered. The " En- 

 cyclopaedia" contains over thirty thousand articles, contributed 

 by nearly one thousand different writers, and includes among its 

 contributors many of the chief authorities in various departments 

 of knowledge. 



— " Questions and Answers about Electricity," a small volume 

 of 100 pages (50 cents) from the press of the D. Van No^trand 

 Corapau}', is peculiar in some respects. It has four authors and 

 one editor, and the latter, we fear, has taken undue liberties with 

 the manuscripts of the authors. In no other way can we account 

 for the presence of such words as "ampage," " furtherest," 

 "shellaced," etc. : and such statements as, when cells are con- 

 nected in muliiple, the current can travel "only a few feet." 

 Though intended specially for amateurs and students, we fear the 

 book will prove more interesting to those " well up" in the sub- 

 ject A glossary, by the editor, no doubt, adds to the originality 

 of the work. 



— " The Sloyd System of Wond-working" is the title of a 250- 

 page volume from the pen of B. B. Hoffmann, A B, , superin- 

 tendent of the Bitron de Hirsch Irade-schools, and just published 

 by the American Book Co (Price $1.) The book gives an ex- 

 cellent account of the theory and practical application of the 

 Naas system of manual training, which has already received con- 

 siderable attention in the volumes of Science. The first two chap- 

 ters of the work give the clearest and most comprehensive ex- 

 position of the system we have seen; the third chapter (some 

 things in which might better have been omitted for common- 

 school purpo.ses) gives a history of the manual training idea; the 



final chapters give an account of various model series and of the- 

 progress of the system in elementary schools. 



— The D. Van Nostrand Company have just published " The 

 Practical Management of Dynamos and Motors," by Francis B. 

 Crocker, professor of electrical engineering in Columbia College, 

 and Schuyler S. Wheeler, D.Sc. To the man in charge of an 

 electric light or power plant this volume will prove invaluable, 

 as it is the first book, as far as we know, devoted specially to 

 their requirements. It gives simple and readily comprehended 

 instructions in the practical use and management of dynamos 

 and motors. The different subjects are treated separately and in 

 logical order, and are arranged so as to facilitate ready reference^ 

 on any point on which information is desired. ($1.) 



— Metal-Coloring and Bronzing " is the title of a new 12mo 

 volume of 336 pages just issued from the press of MacmiUan & 

 Co. (Price |l.) The book is the result of experiments and in- 

 vestigations carried on for eighteen months by Arthur H. Hiorns, 

 principal of the metallurgy and engineering department of the 

 Birmingham (England) municipal school; and is, we believe, the 

 first systematic treatise on metal-coloring (more commonly 

 known as bronzing) that has been published. The essential por- 

 tion of the work is treated under three principal divisions, 

 namely, chemical, electro-chemical, and mechanical metal color- 

 ing, the first being given greater space on account of its greater 

 importance. The introductory portion contains a brief account 

 of the properties of the ordinary nretals and their chemical rela- 

 tions with regard to oxygen, sulphur, chlorine, etc.; and also 

 deals with the chemical effects of the atmosphere on metals, the 

 relation of metals to color, and chemical principles and changes. 

 The rest of the volume is devoted mainly bo the mechanical pro- 

 cesses employed. As an authority on metallurgy the author of 

 this work is well known; and this, with the fact that the book is 

 the first in its peculiar field, insures for it a secure place in tech- 

 nical literature. 



Dr. T H. Andrews, Jefferson 

 Medical Col lege, Philadelphia, says of 



Horsford's Acid Phosphate. 



"A wonncrUil remedy which gave me 

 most gratifying results in the worst 

 forms of dyspepsia." 



It rtaches various forms of 

 Dyspepsia that no other medi- 

 cine seems to touch, assisting 

 the weakened stomach, and 

 making- the process of diges- 

 tion natural and easy. 



Descriptive pamphlet free on application to 

 Runilord Chemical Works. Providence, R. I. 



Beware of Substitutes and Imitations. 



For sale by all Druggists. 



Exchanges. 



[Freeof charge to all, if of satisfactory character 

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



For sale or suitable exchange. — A spectrometer 

 made by Fauth & Co., Washington, D. C.. according 

 to the plan of Prof. C. A. Young. This instrument 

 is suitable for the most advanced investigations 

 and determinations. Cost originally $700 and has 

 been used but little. Will be disposed of at a con- 

 siderable reduction. Address Department of Phys- 

 ics, Ohio University, Athens, O. 



I will send British land and fresh-water shells in 

 return for those of America, any part, sent to me. 

 I have at present about fifty or sixty species, with 

 many varieties. W. A. Gain, Tuxford, Newark, 

 England. 



The Biological Department of HamlineUciversity 

 desires t(i offer roicr-'scopic slides of animal tissues, 

 or whole animals, in exchange for lirst-class fossils. 

 Address correspondence to Henry L. Osborne, Ham- 

 liue University. fJamlme, Minn. 



For sale.— A set of the Berichte der Deutschen 

 Chemischen Gesetlscaft, from Jan. 1. 1877, to Jan. 1 

 lSa2. bound in twenty-six volumes to Jan. 1. 18«8 

 and remaining four years unbound. Also the Bulla 

 tin de la Societe Chemique de Paris, from Jan. 1 

 1879, to Jan. 1, 180i. bound in eighteen volumes to 

 Jan. I, 1S88. and remaining four years unbound. 

 Dr. Marcus Benjamin, care^of D. Appleton & Co., 

 1 Bond St., New York City. 



F<ir SHle. — 1.5' bird, and 12o mammal skins, which 

 are first-class and labelled with strictly reliable 

 data. They were collected in this immediate vicin- 

 ity and are'preserved and made up according to the 

 latest approved methods. As I offer the above at a 

 verv low price, it would be a good opportunity for a 

 college or a museum. Willard E. Treat, East Hart- 

 lord, Conn. 



For Sale.— A new Model U. S. Army Hospital 

 ]\licroscope (Zentmaver), also i^inch and IJ^-inch 

 Objecnves. HENRY C. WELLS, 151 Broadway. 

 New York. 



Wajzis. 



WANTED. — American Journal of Conchology- 

 seven volumes. Parties having these for 

 sale will please address the undersigned, stating^ 

 condition and price. R. Ellsworth Call,LouisviUe,Ky. 



A GRADUATE ENGINEER will give instruction 

 evenings in geometry, trigonometry and sur- 

 veying, mechanics, physics, mechanical drawing, 

 and general engineering construction. Five years' 

 experience in field and editorial work on engineer- 

 ing journal. References furnished. C. S. H., 102 

 Tribune Building, New York. 



A POSITION is desired in the South, preferably 

 j\ the Gulf States, where 1 can teach the sciences. 

 Can also icstruct 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 accent regular school 

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

 Kalamazoo, Mich. 



117ANTED.— By well- qualified and experienced 

 Vv science master and associate of the Royal 

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

 England), 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. 



AGRADtJATE of the University of Pennsylvania 

 and a practical mineralogist of twenty years' 

 experience desires to give bis services and a cabi- 

 net of 25,1 00 specimens, all named, with about the 

 same number of duplicates, in minerals, crystals, 

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

 logical specimens and woods to any institution de- 

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

 crease the cabinet to oO.tXiO 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. 



The American Geologist for 1893. 



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

 Lafayette College; Dr. Persifor Frazer. Penn Hort. Soc; Prof F. \\. Cragin. Colorado College: 

 Prof Rob t T. Hill. U. S. Irrigation Survey; Dr. Andrew C. Lawson. University of California; Frank 

 D Knowlton, U. .s. National Museum; Joseph B. Tyrrell, Geol. Sur.of Canada; E. O. ULRicH.Minnesota 

 Geological Survey; Prof. 1. C. White. Uuiversity of West Virginia; Prof. N. H. Wischell. University 

 of Minnesota. Now in its Xth volume. S3. 50 per year. Sample copies. 20 cents. Address 



THE GEOLOGICAL PUBLISHING CO., Minneapolis, Minn. 



