April 14, 1893.] 



SCIENCE. 



209 



the astonishing statement in the same article that "most of these 

 so-called gravel implements of Europe are doubtless the rejects of 

 manufacture," pre-historic archeeologists, and especially those of 

 Europe, will draw their own inferences a« to the qualifications 

 for pronouncing an ex cathedra decision of the man who made 

 the statement (Science, Not. 25, 1892) that "there is not in the 

 museums of Europe or America a single piece of flaked slone 

 found in 'place in the gravels of America and satisfactorily veri- 

 fied that can with absolute safety be classified as an implement 

 at all." 



I have had occasion elsewhere to refer to Mr. Holmes's fondness 

 for making startling assertions, instancing his statement about 

 the Indians, in the same article in Science, that their "quarrying 

 was accomplished mainly by the aid of stone, wood and bone 

 utensils, aided in some oases perhaps by fire. With these simple 

 means the solid beds of rock were penetrated to depths often 

 reachibg twenty-five feet." 



The readers of Science have lately had an opportunity of ob- 

 serving also that Mr. Holmes " strongly deprecates personalities 

 in scientific discussion." Henet W. Haynes. 



Boston, March 33. 



BOOK-REVIEWS. 



The History and TJieory of Money. By Sidney Sherwood. 

 Philadelphia, J. B. Lippinoott Co. $3. 

 This book contains twelve lectures delivered in the university 

 extension course at Philadelphia last year before a company of 

 bankers and others interested in the subject of finance Half the 

 lectures are professedly historical and the other half theoretical; 

 but the historical element is really predominant throughout them 

 all. This seems to us a mistake, for the history of money cannot 

 be properly understood nor appreciated without a previous ac- 

 quaintance with the theory, and in these lectures the theory is 

 not stated with anything like the clearness and fulness which 



the subject demands. However, it was expected that the atten- 

 dants on the lectures would read and study for themselves during 

 the progress of the course, the books recommended for their use 

 being named in this volume; and such reading would supplement 

 the instruction given in the lectures. Mr. Sherwood, who is at- 

 tached to the Wharton School of Finance in the University of 

 Pennsylvania, shows a thorough familiarity with his subject, and, 

 what is quite as important, he has no hobbies to ride, and is not 

 prone to extreme or one-sided views. He begins by showing what 

 money is for, what purposes it fulfils in the world's economy, and 

 then proceeds to treat of the different kinds of money in use, with 

 remarks on coinage, on the history of the precious metals, and 

 on government notes and bank notes, with brief discussions of 

 some of the many economic questions which tho.=e subjects in- 

 volve. The lectures are expressed in a plain and straightforward 

 style, which the hearers could readily understand, and they were 

 evidently enjoyed by those who listened to them. For our part, 

 however, we have found the discussions at the end of each lecture, 

 and which are here reported in brief, the most interesting part of the 

 book as well as the most suggestive. There were many persons 

 in the audience well equipped with both theoretical and practical 

 knowledge of the subject, and their discussions with Mr. Sher- 

 wood and with one another called up many points that were not 

 touched upon in the lectures, and presented various and some- 

 times conflicting views. Among the debaters was a lady of 

 socialistic proclivities, whose remarks and questions added variety 

 and piquancy to the scene, though she did not appear to have 

 many sympathizers. On the whole, though it cannot be regarded 

 as an adequate scientific treatise on money, this book will cer- 

 tainly have an interest for all who care for its subject. 



AMONG THE PUBLISHERS. 

 J. B. LrppiNCOTT Company announce as in preparation "Va- 

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Descriptive pamphlet free. 

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Beware of Substitutes and Imitations. 



Exchanges. 



[Freeof charge to all, if of satisfactory character. 

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



For sale. — An, Abbe binocular eye-piece for the 

 microscope. Alfred C. Stokes, 527 Monmouth St., 

 Trenton, N. J. 



For sale < 

 ington E. : 

 water, aQ( 

 camera or 

 Mich. 



ir exchange. — One good long range Rem' 



J. rifle, 44 calibre, also land and fresh 



marine shells. Want shells. Safety, 



printing press. A. H. Boies, Hudson, 



Fine collection of microscopic slides for sale, or 

 would exchange for first -class pneumatic bicycle. 

 J. E. Whitney, Box 549, Rochester, N. Y. 



For sale— A Zentmayer new model U. S. Army 

 Hospital monocular stand. Price gllO, will sell for 

 $75. Address H. C. Wells, No. 151 Broadway, New 

 York. 



For sale — A complete set of the third series of the 

 American Journal of Science (1870-1893) handsomely 

 bound in single volumes in dark brown half moroc- 

 co. Address Gr. H. Williams, 803 Cathedral Street, 

 Baltimore, Md. 



For sale, or for exchange for books on medi- 

 cine or surgery, new editions only, a large geo- 

 logical library, containing nearly all the State and 

 G-overnment Reports sine- 1855. Will be pleased to 

 answer letters of inqur^^P^^^nd give information. 

 Address R. ELLSWORTH i-,^\VL, Louisville, Ky. 



For exchange.— Slides of Indian Territory Loup 

 Fork Tertiary Diatoms for other microscopic fos- 

 sils. Address S. W. WILLISTON, Univ. of Kansas, 

 Lawrence, Kans. 



For exchange.— Will exchange an "Ideal" Mi- 

 croscope of R. and J. Beck, L'bndoD, 2 eye pieces 

 3 objectives, 3 inch, 1 inch, 1-6 inch; buir's eye con 

 denser on stand, substage condenser, mechaiiica 

 stage, etc., for any of the leading makes of type 

 writers. Particulars by mail. DELOS FALL, Albion 

 College, Albion, Mich. 



For sale or exchange. — J have a few copies of my 

 translation of " Strasburger's Manual of Vegetable 

 Histology, 1887, ■" now out of print, which I will send 

 post-paid for S3 or for one dozen good slides illus- 

 trating plant or animal structure. Address A. B. 

 Hervey, St. Lawrence University, Canton, N. Y. 



For sale or eschang(>',— A private cabinet of about 

 200 species of fossils, well distributed geologically 

 and geographically. Silurian, about 40; Devonian, 

 about 50; Carboniferous, about 80; others, about 30. 

 Frank S. Aby, State University, Iowa City, la. 



Wa7tts. 



THE undersigned desires specimens of North 

 American Gallinae in the flesh for the study of 

 their pterylosis. These species are especially de- 

 sired : Colinus ridgwayi, cyrtonyx montezumae^ 

 d€udragapusfranklini,lagopiiswelchi,tympanuch%ts 

 cupido and pedioecetes phasianellus. 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, 3922 Fifth Avenue, Pittsburgh, Pa. 



WANTED— Second-hand copy Tryon's Systematic 

 Conchology. Please quote condition, date, price. 

 H. L. Osborn, Hamline University, St. Paul, Minn. 



A COMPETENT TEACHER of botany in college 

 or university is open to engagement. Address 

 L., Box 86, Rochester, Mich. 



CAN any one inform me as to the age to which 

 cats have lived? I have one twenty years old. 

 Edward D. Webb, 133 W. Eighty-first St., New York. 



WANTED — Second-hand. Foster's Physiology, 

 Balfour's Comparative Embryology, Claus & 

 Sedgwick's Zoology, Flower's Osteology of Mam- 

 malia. Vine's Physiology of Plants. .Please state 

 editions and prices asked and address Richard 

 Lees Brampton, Ontario, Canada 



WANTED.— American Journal of Oonchology, 

 seven volumes. Parties having these for 

 sale will please address the undersigned, stating 

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



A 



GRADUATE ENGINEER will give instruction 

 evenings in geometry, trigouometry and sur- 

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

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WANTED.— By well - qualified and experienced 

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