November 24, 1893.] 



SCIENCE. 



293 



witli generalities and seeks to separate facts from 

 principles acquired by hypothetical speculations as well 

 as to define precisely the meaning of terms employed. A 

 methodical and rapid presentment is made of the laws of 

 combination, of chemical equivalence, the atomic theory, 

 of crystallogra23hic laws, and of thermo-chemistry. It is 

 shown that the atomic theory, a beautiful structure in it- 

 self, might still be done away with without in any degree 

 undermining the laws of chemical equivalents. Great 

 pains have been taken with the second part of the book, 

 which deals with the metalloids as is evidenced in the ex- 

 actness of the facts recorded. Original memoirs have in 

 each case been consulted and when there has been doubt or 

 contradiction the authors have verified their decision by 

 actual experiment. So also with those portions treating 

 of industrial chemical processes, modern and practical 

 usage have alone been given passing over former pro- 

 cesses in a few words as of historic interest only. This is 

 a relief from the custom of many authors who through 

 lamentable ignorance deceive the student with descrip- 

 tions of processes as impossible as they are false. In 

 short the features of the work are, an eminently success- 

 ful dejDarture from accepted notions of chemica] text- 

 books, a suppression of old and hoary errors which have des- 

 cended through these same text-books from our ancestors 

 to the jjreseut day, new methods of treatment and new 

 illustrations. Some of the French scientific periodicals 

 have predicted for the "Lecons de Chimie" "a place 

 among the classics which will be as lasting as it is well 

 merited" and such praise we feel confident will be ac- 

 corded by all who peruse the work. Charles Platt. 



NOTES AND NEWS. 



Accoedinct to the State Board of Health of Michigan, 

 the statistics of sickness have demonstrated the law that 

 generally influenza (la grippe) is quantitatively related to 

 the atmospheric ozone — the more ozone the more influenza; 

 and the law that remittent fever is inversely related — the 

 more ozone the less remittent fever. The unusual amount 

 of ozone, the increase of influenza and the falling off of 

 remittent fever shown in the State Board of Health Bul- 

 letin for the week ending November 18 illustrate these 

 general laws. 



— Bulletin No. 48 of the National Museum contains the 

 collected writings upon Myriapods by the late Chas. H. 

 Bollman. The volume is edited by Dr. Underwood, who 

 also contributes an excellent list of the literature of the 

 N. A. species. The writings of Mr. Bollman are given in 

 their order as published in Entomologica Americana, Proc. 

 of United States National Museum, and other publications, 

 and include also many articles which were ready for the 

 printer at the time of Mr. Bollman's death. These latter 

 will be especially valuable to the student of N. A. Myria- 

 pods, as they include articles upon the "Classification of 

 the Myriapoda" and a catalogue of the N. A. species. 

 Mr. Bollman described sixty-five species new to N. A., 

 nearly all of which will stand, and when we consider that 

 he was not yet twenty-one years of age at the time of his 

 death we can but regret that he was not spared for 

 further work. The volume just published by the Museum 

 is by far the best work on N. A. Myriapods that has 

 appeared since Wood's paper in 1865. 



WJl 



Horsford's Acid Phosphate 



Is the most effective and agreeable 

 remedy in existence for preventing 

 indigestion, and relieving those dis- 

 eases arising from a disordered 

 stomach. 



Dr. ^V. W. Gardner, Spring- 

 field, Mass., says, "I value it as an excel- 

 lent preventative of indigestion, and a 

 pleasant acidulated drink when proper- 

 ly diluted with water, and sweetened." 



Descriptive pamphlet free on application to 



RUMFORD Chemical Works, Providence, R. I. 



Beware of Subs' itutes and Imitations. 



For Scile by all Druggists. 



[Free of charge to all, if of satisfactory character. 

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

 York] 



Sale.— A very fine telescope, length extended, 

 twenty-iive inches, closed, seven inches. Powe r 

 twent3'-five times. Good as new. Cost $25.00. 

 Will sell for the best cash offer. B. S. Bowdish, 



165, Phelps, N. Y. 



Sale or Exchange for last editions of Standarc 

 Woriis on Vegetable Anatomy or Physiology 

 Practical Zoology, Marshall & Hurst; Elements of 

 Embryology, Foster & Balfour; Zoology, Macalis- 

 ter; Guide to the Study of Insects, Packard; Geolog- 

 ical Studies and Shall We Teach Geology, Winchell. 

 Also have duplicates of Experiment Station pub- 

 lications which would like to exchange for any n< t 

 in my file. L. R. Jones, Burlington, Vt. 



For exchange.— Skins of Aegialites nivosa, Ereu- 

 netes occidentalis, Aunnodramus Arldingi. A. 

 rostratus, Chamara lasciata henshawi, etc., for 

 native or foreign skins with full data. Send lists. 

 A. W. Anthony, 2042 Albatross St., San Diego, Cali- 

 fornia. 



I have a Beck New National monocular microscope, 

 accessories, microtome, mounting material and a 

 large number of fine slides. Will exchange the 

 whole or in part for a first class type-writer or 

 photograph outfit. A. C. Gruhlke, Waterloo, Ind. 



Offered sidebloom eggs of Bulimus oblongus and 

 exotic land and freshwater shells in exchange foi 

 Helices not in collection. Send lists to G. K. Gude, 

 5 Gresbach Road, upper Hoiloway, London, Eng- 



Wards. 



A GEOLOGIST thoroughly conversant with the 

 '^ geology ot the Southern States desires an en- 

 gagement. Has complete knowledg:e of the eco- 

 nomic geology of Iron, Coal, Lignite, as well as 

 Clay and Kaolin. Five years' experience with 

 Geological Surveys. Address K., 509 West Sixth 

 Street, Austin, Texas. 



w 



ANTED.— Tuckerman's Geneva Lichenum and 

 Carpenter on the Microscope, Wiley's In- 

 aduction to the Study of Lichens. State price 

 d other particulars. Richard Lees, Brampton, 



W^ 



ANTED.— Icones Muscor um by W. D. Sulli- 

 vant, with or without Supplement, but both 

 preferred. Address, stating price and condition 

 of books. Dr. G. N. Best, Rosemont, N. J. 



WANTED.— A copy of Mascart & Joubert's Les- 

 sons in Electricity and Magnetism, Vol. I. Ad- 

 dress R. W. Clawson, Vanderbilt University, Nash- 

 'lle, Tennessee. 



pHEMIST.— Graduate of a polytechnical school, 

 ^-^ and studied photographic chemistry in Ger- 

 many and Austria. Situation teaching or in ana- 

 lytical or experimental laboratory. M. B. Punnett, 

 Rochester, N. Y. 



„,,.,., ^ . ■ c r^ A- \X/ANTED.— A recent college graduate to assist in 



Would like to exchange loo specimens of Canadian W editorial work on Scilnce. Those seeking 

 Indian Relics for a photo outfit. E. J. Waters, 33 i^rge emoluments need not apply. N. D. C. 

 Hoffman St., Auburn, N. \ . Hodges, 874 Broadway, New Y ork. 



