SCIENCE. 



[Vol. XXII. No. 566 



Probably you take 



THE 



Electrical Engineer. 



Most people interested iu Electricity 

 do. 



If you do not, now is a good time to 

 begin. 



It is pnblishpd every Wednesday. 



Subscription, $3,00 per year. 



You can try it three mouths for fifty 

 cents. 



Address: 



''■The Electrical Engineer, , 

 203 Broadway, - - - New York, N.Y, 



QUERY. 



Can any reader of Science cite 

 a case of lightning stroke in 

 which the dissipation of a small 

 conductor (one-sixteenth of an 

 inch in diameter, say,) has failed 

 to protect between two horizon- 

 tal planes passing through its 

 upper and lower ends respective- 

 ly? Plenty of cases have been 

 found which show that when the 

 conductor is dissipated the build- 

 ing is not injured to the extent 

 explained (for many of these see 

 volumes of Philosophical Trans- 

 actions at the time when light- 

 ning was attracting the attention 

 of the Royal Society), but not 

 an exception is yet known, al 

 though this query has been pub- 

 lished far and wide among elec- 

 tricians. 



First inserted June 19, 1891. No re- 

 sponse to date. 



N. D. C. HODGES, 874 BROADWAY, N. Y. 



$25to$50F\r"- 



RACES AND PEOPLES. 



By DANIEL G. BRIN TON, M.D. 



"The book is good, thoroughly good, and will long 

 remain the best accessible elementary ethnography 

 in our language."— T/ie Christian Union. 



*'We strongly recommend Dr. Brinton's 'Races 

 and Peoples ' to both beginners and scholars. Wo 

 are not aware of any other recent work on the 

 science of which it treats in the English language.'' 

 —Asiatic Quarterly. 



"His book is an excellent one, and we can heartily 

 recommend it as an introductoi-y manual of ethnol- 

 ogy-*"— T/ie Monist. 



"A useful and really interesting work, which de- 

 serves to be widely read and studied both in Europe 

 and America,."— Brighton (Eng.) Herald. 



"This volume is most stimulating. It is wruteu 

 with great clearness, so that anybody can undei- 

 stand, and while in some ways, perforce, superficial, 

 grasps very well the complete field of humanity."— 

 27ie New York Times. 



"Dr. Brinton invests his scientific illustrations and 

 measurements with an indescribable charm of nar- 

 ration, so that 'Races and Peoples,' avowedly i rec- 

 ord of discovered facts, is in reality a strong stim- 

 ulant to the imagination."— Philadelphia Public 

 Ledger. 



"The work is indispensable to the student who re- 

 quires an intelligent guide to a course of ethno- 

 graphic reading." — Philadelphia Times. 



Price, postpaid, $1.75. 



newspaper ClSppings. 25,000 In Stock. 

 'What do you want? I*et us know. We 

 can supply you. Tlie Clemens New^s 

 Agency, Box 2329- San Francisco, Cal- 



WE CANNOT 

 SPARE 



healthy flesh — nature never 

 burdens the body with too 

 much sound flesh. Loss of 

 flesh usually indicates poor as- 

 similation, which causes the 

 loss of the best that's in food, 

 the fat-forming element. 



Goirs 



of pure cod liver oil with hypo- 

 phosphites contains the very 

 essence of all foods. In no oth- 

 er form can so much nutrition 

 be takcLi and assimilated. Its 

 range of usefulness has no limita- 

 tion where weakness exists. 



HANDY BOOKS. 



PRACTICAL ELECTRICS, a universal handy book 



no every day Electrical matters, fourth edition. 

 i^5pai?es, I2VO, cloth, price 75 cents. 

 ELECTRICAL TABLES AND MEMORANDA for 



Engineers, by Silvanus P. Thompson, 128 pages, 



Illustrated, 64 mo, roan, 50 cents. 

 A SYSTEM OF EASY LETTERING by Howard 



Cromwell, 32 different styles, 50 cents. 

 THE ORNAMENTAL Penman's pocketbook of 



alphabets, 37 different stvles, 20 cents. 



Books mailed post paid to any address on re- 

 ceipt of publish price. 



SPON & CHAMBERLAIN, 

 VIention th's paper. 12 Cortlandt St., N. Y. 



"BUSY FOLKS' GYMNASlUfl." 



A few minutes' daily exercise 



on our fascinating apparatus 



clears the brain, tones up the 



body, develops weak parts. Our 



cabinet contains chest weights, 



rowing-weights, lifting-weights, 



clubs and dumb bells, adjust- 

 able for old and youne. // is 



the only complete exercising outfit 



in the world suitable for use in 



living rooms. All prices. You 



can order on approval. Chest 



machine separate, $4.50 and up. |^°S'f^orRTunyi^h^o'ufd^e°r^ 



Educated agents wanted. Phvsi 



CAL Culture Chart, with illustrated directions for de- 

 veloping every part of the body healthfully, 50 cts. Sent for half price to thost 

 naming this paper. 



WHITNEY HOME GYMNASIUM CO.. Box D., Rochester. N. Y. 



The Boston Medical and 

 Surgical Journal. 



BOSTON, - - - - MASSACHUSETTS. 



A FIRST-CLASS WEEKLY MEDiCAL NEWSPAPER. ESTABLISHED 1828. 



Terms of SnbBcription : In the Tnited States, and to Canada and Mexico. S5 00 a year In ad 

 prance. To Foreign Countries embraced in the Universal Postal Union, Sl.Sti a year additional. Single 

 numbers, I5c. 'i en consecutive numbers free by mail on receipt of Sl.OO 



This Journal circulatps chiefly through the New England States, and is seen by the great majority 

 of the profession in that important district. As a means of reaching rhysicians it is unequalled. 



H is under the editorial management of Dr. George H. Shattuck. n; sisted by a large staff of compe- 

 tent coadjutors. Subscriptions and advertisements received by the undersigned, to whom remittances 

 by mail should be sent by money-order, draft or registered letter. 



DAMEELL & TJPHAM, 283 Washinfton Street, Bostoiip Masa. 



