SCIENCE. 



[Vol.XXlII.No. 570 



IPrdbaMy you take 



THE 



Electrical Engineer. 



Most people interested in Electricity 

 do. 



If yon do not, now is a good time to 

 begin. 



It is published every Wednesday. 



Subscription, $3.00 per year. 



Yon can try it three months for fifty 

 cents. 



•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. 



LIGHTNING PLATER 



and plating jewelry, watohei 

 tJihloware, &c. Plates the 

 finest of jewelry good as 

 ni-W on all kinds of meta] 

 with gold, silver or nickel. 

 No e-^perience. No capital. 



- ,- ^Torcircu- 



lira II. E. DELNOds 

 to , ColumbuB, O. 



RACES AND PEOPLES. 



By DANIEL G, BRINTON, 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 'Haces 

 and Peoples' to both beginners and scholars. We 

 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 introductoiy 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 Anierica."~Br/5r/ifon (Eng.) Herald. 



"This volume is most stimulating. It is written 

 with great clearness, so that anybody can under- 

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

 grasps very well the complete field of humanity."— 

 The New York Times. 



"Dr. Brinton in vests his scientific illustrations and 

 measurements with an indescribable charm of nar- 

 ration, so that 'Races and Peoples,' avowedly a 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 rea.ding.^''— Philadelphia Times. 



Priee, j^ostpaUl, $i.75o 



TBE AMERICAN RACE. 



By DANIEL G. BRINTON, M.D. 



" The book is one of unusual interest and value."-- 

 Inter Ocean. 



'* Dr. Daniel G. Brinton writes as the acknowledged 

 authority of the subject.''''— Philadelphia Press. 



" The work will be oi genuine value to all who 

 wish to know the substance of what has been found 

 out about the indigenous Americans."— iV^ait^re. 



"A masterly discussion, and an example of the 

 successful education of the powers of observation." 

 —Philadelphia Ledger. 



Price, postpaid, $2. 



N. D. C. HODGES, 



874 BROADWAY, NEW YORK. 



on Scott's 



Emulsion, ^#^7 , 



b a c a u s e 'Jvi^. W( 



fat f o o d s 



make f a t ^^^ 



children. ^ 



They are 



thin, and remain thin just in 



proportion to their inability to 



assimilate food rich in fat. 



of Cod Liver Oil is especially 

 adaptable to those of weak diges- 

 tion — // IS partly digested already. 

 Astonishing how quickly a thin 

 person gains solid flesh by its use! 

 Almost as palatable as milk. 



HANDY BOOKS. 



PRACTICAL ELECTRICS, a universal handy book 



o every day Electrical matters, fourth edition. 



^5papes, 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 styles, 20 cents. 

 Books mailed post paid to any address on re- 

 ceipt of publish price. 



SPON & CHAMBERLAIN, 

 Mention this paper. 12 Cortlandt St., N. Y. 



FOSSIL RESINS. 



This book is the result of an attempt to 

 collect the scattered notices of fossil resins, 

 exclusive of those on amber. The work is of 

 interest also on account of descriptions given 

 of the insects found embedded in these long- 

 preserved exudations from early vegetation. 



By CLARENCE LOWN and HENRY BOOTH i 



H. D. C. HODGES, 874 Broadway, N. Y. 



BUSY FOLKS* GYMNASIUfl." ~^ 



~^ ■ A few minutes' daily exercise 



H.L' 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 young. It is 

 the only complete exercising outfit 

 ifi the world suitable for use in 

 I* living rooms. All prices. You 

 can order on approval. Chest 

 ^^^ machine separate, $4.50 and up. 

 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 thos« 

 naming this paper. 



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



Shoulders and Upper Back 

 good for Round Shoulders 



