July 7, 1893.] 



SCIENCE. 



13 



such tables. In Table IV. will be found all of the useful constants 

 used in mathematics, chemistry> engineering, physics, and weights 

 and measures. This table is a very complete one, containing, as 

 it does, reference to almost every standard and constant used in 

 the arts and science. Table V. is a reprint of the Gaussian six- 

 place addition-subtraction logarithms. For determining trigo- 

 nometric functions, there are two tables, the four-place already 

 mentioned, and also a six-place table. The latter is a departure 

 from the usual method. Generally, in a six-place table, the func- 

 tions are given for each ten seconds. Professor Jones has made 

 up the table for each minute of the quadrant, the proportional 

 part being given for each second. The tables that follow those 

 just explained consist of prime and composite numbers, squares, 

 cubes, square-roots, cube-roots, reciprocals, and quarter-squares. 

 Finally, we have Bissel's table of coetHcients for interpellation, and 

 a table containing the integral for finding the mean or probable 

 error of a result in least squares. We judge from our examination 

 that Professor Jones has prepared the tables with great care. He 

 seems exceedingly anxious to free them of all errors, jnd to in- 

 duce that condition of things he offers a reward for an error found 

 in the tables. We have not critically examined the tables, but we 

 note a slight error in the text. On the first page the reference to 

 the pages containing Table IX. should read 118-133 instead of 

 114-183. We would commend these tables to the computer as 

 being a help to have on one's desk. G. A. H. 



Pioneers of Science. By Oliver Lodge, F. E. S., Professor of 

 Physics in Victoria University College, Liverpo.ol, with Por- 

 traits and Illustrations. London, Macmillan & Co. 404 p. 8°. 

 $3.50. 



In this work. Dr. Lodge has given the general public and the 

 student a very interesting and readable book. As he states in 

 his preface the book had its origin in a course of lectures on the 

 history and progress of astronomy, delivered by the author in 

 1887. As is often the case with books based on a course of lect- 



ures, it is somewhat disjointed. It is full, however, of interest- 

 ing matter, and is lavishly illustrated, an unusual feature in 

 works of this class. Its title is unfortunately misleading as the 

 author does not attempt to cover the whole growth of scientific 

 knowledge, but confines himself to astronomy. The book, how- 

 ever, is unique in the endeavor by means of plain, unaffected 

 writing and a wealth of illustration to bring the pioneers of celes- 

 tial knowledge into almost personal acquaintanceship with the 

 reader, tracing the history of their discoveries and the depend- 

 ence of one discovery upon another. It is to be commended to 

 students of the history of science as a most useful reference 

 book, and to the genenal reader as a book at once entertaining 

 and instructive. J. E. I. 



AMONG THE PUBLISHERS. 



The career of the late Sir Richard Burton, the distinguished 

 traveller, was most adventurous and romantic. He was an ency- 

 clopaedic scholar, and much more than a scholar. He knew and 

 had seen more of dark Africa than most men, and more of Mo- 

 hammedan lands than any man. His biography, by Lady Burton, 

 will be published shortly by D. Appleton & Co. The book will be 

 decorated with illustrations and maps, as well as portraits. The 

 first part of the story, it is said, will in the main be told in Sir 

 Richard's own words. 



— The weekly paper known for the last twenty-five years as 

 The Christian Union with its first issue for July changes its title 

 to The Outlook. It will remain unchanged in other respects, ex- 

 cept in the line of improvement and enlargement. It will be, as 

 before, a family paper, non-d«nominational in religious matters, 

 and giving large space to the current history of our times; to lit- 

 erature, economics and progressive movements of all sorts, and 

 to home life. The Rev. Dr. Lyman Abbott will reuiain as ils 

 editor-in-chief, with Mr. Hamilton W. Mabie as his associate, 

 and an editorial staff of several members. 



Delicious 



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Allays the thirst, aids diges- 

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Dr, M. H. Henry^ New York, says: 

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Descriptive pamphlet free. 

 flumford Chemical Works, Providence, R. I. 



Beware of Substitutes and Imitations. 



Exchanges. 



[Freeof charge to aU, if,ofsatisfactorycharacter. 

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



I bave a fire-proof safe, weight l,lfO pounds, 

 which I will sell cheap or exchange for a gasoline 

 engine or some other things that may happen to 

 suit. The safe is nearly new, used a short time 

 only. Make offers. A. Lagerstrom, Cannon Falls, 

 Minn., Box 857, 



For exchange. — Hudson River fossils in good con- 

 dition from the vicinity of Moore's Hill, Ind., also 

 land and fresh water shells. Desire fossils and 

 shells from other groups and localities. Address 

 Geo. C. Hubbar J, 31oore's Hill, Ind. 



For sale at low price. — A fine old-fashioned photo- 

 graphic camera, rosewood box, one foot square, 

 lenses, four inches diameter, made by C. C. Harri- 

 son. Plateholders, troughs, baths, etc., all in large 

 wooden case, formerly the property of the late 

 President Moore, of Columbia College. This is a 

 fine example of an instrument of the best make for 

 the old wet-process methods, and valuable to any 

 institution 01 amateur interested in the history of 

 photography in the U. S. Address M. S. Daniel, 

 ^36 W. -ith St., New York. 



X wish to exchange a collection of 7,000 shells, 

 lOol species and varieties, American and foreign, 

 land, fluviatile and marine, for a good microscope 

 and accessories. Address, with particulars, Dr. 

 Lorenzo G. Yates. Santa Barbara, California. 



For exchange.— I wish to exchange Lepidoptera of 

 South Dakota and other sections, for Lepidoptera 

 of the woWd. Will purchase species of North Amer- 

 ica. Correspondence solicited, particularly with 

 collectors in the Rocky Mountains, Pacific coast 

 and Hudson's Bay regions. P. C. Truman, Volga, 

 Brooking county, South Dakota. 



For sale.— Wheatstone Bridge wire, made to 

 order, new and unused. Price. SIO. W. A. Kobbe, 

 Fortress Monroe, Va. 



For sale or exchange.— One latest complete edi- 

 tion of Watt's Dictionary of Chemistry, in fair con- 

 dition; one thirty volume edition (;9th) of Allen's 

 Encyclopeedia Britannica, almost new. Will sell 

 cheap for cash or will exchange for physical or 

 chemical apparatus. Address Prof. W. S. Leaven- 

 worth, Ripon College. Ripon, Wis. 



Exchange.— One celestial, one terrestrial globe, 

 one lunatettis and charts, celestial maps, diagrams 

 and ephemeris from 1830 to 1893. astronomical 

 works, all in good condition. Will sell cheap or ex- 

 change. Make offer. C. H. Van Dom, 79 Nassau 

 St., New York. 



Wa7iis. 



A GRADUATE of an American Polytechnic insti- 

 tution and of a German university (Gottingen), 

 seeks a position to teach chemistry in a college or 

 similar institution. Five years'* experience in 

 teaching chemistry, Address Chemist, 757 Gary St.» 

 Brockton, Mass. 



AN experienced teacher in general biology wishes 

 a position in a first-class college or university. 

 Three years in post-graduate study. Extensive 

 experience. Strong indorsements. Addrpss E. W. 

 Doran, Ph.D., 1337 G St., N. W., Washington, D. C. 



THREE teachers wanted for a male and female 

 seminary in central New York. Typewriting, 

 etc., languages, mathematics, sciences, et. al. Send 

 stamp with and for particulars. Box 701, Hemp- 

 stead, L. I. 



A ZOOLOGICAL collector and taxidermist of ten 

 years' experience in the field is now open to en- 

 gagement, for either field or laboratory work. 

 References furnished. Address Taxidermist, Bos 

 75, White Sulphur Springs, West Va. 



\1TANTED.— A set of Allen's Commercial Organic 

 VA' Analysis. 4 vols. Vols. I. and II. particularly 

 desired. Condition not important, all leaves being 

 present and in place. Address Charles Piatt, 34 

 Lewis Block, Buffalo. 



WANTED, as principal of a flourishing technical 

 school, a gentleman of education and experi- 

 ence who will be capable of supervising both me- 

 chanical and common school instruction. Special 

 familiarity with some technical branch desirable. 

 Address, giving age. qualifications, etc., J. B. Bloom- 

 ingdaie. Fifty-ninth street and Third avenue, N. Y. 



TITANTED.— A young man as assistant in our 

 VV microscopical department. Queen & Co., 

 Philadelphia. 



THE undersigned desires specimens of North 

 American Gallinae in the flesh for the study of 

 their pterylosis. These species are especially de- 

 sired: Coliiius ridgjcayi, ct/rttnii/j- montezutnae, 

 deiidragapus/raiiklini, lagopus n'eichi.t>/7npamichits 

 cu2)ido and pedioecefes phasianelhts. Any persons 

 having alcoholic specimens which they are willing 

 to loan or who can obtain specimens of any of the 

 above are requested to communicate with Hubert 

 Lyman Clark, 3923 Fifth Avenue, Pittsburgh, Pa. 



