SCIE 



LEntered at the Posi-Offlce o£ New York, N.Y., as Second-Class Matter.J 



Ninth Tear. 

 Vol. XVII. No. 427. 



NEW YOJRK, April 10, 1891. 



Single Copies, Ten Cents. 

 13.50 Per Year, in Advance. 



SEASONABLE SCIENCE STUDIES. 



THE CATALOGUE OF THE 



AMERICAN BOOK COMPANY 



presents many attractive and popular text-books appropriate to the present season. In 

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BOTAI^T 



Are works by such well-known educators and scientists as Bentley, Coulter, Gray, Goodale, 

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 On the subject of 



GEOLOGY 



Is a list of a dozen works by Andrews, Dana, Geikie, Kedzie, Le Conte, McAdoo and 

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ASTEOI^OMY 



Are contributions by Bowen, Gillet and Rolfe, Kiddle, Lockyer, Norton, Peck, Roy, 

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BIOLOGY a:nd zoology 



the authors are Nicholson, Cooper, Holder (C. F. and J. B.), Hooker, Morse, Steele, 

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STATURAL PHILOSOPHY 



the Company has just issued " Appletons' School PhysicS." By a corps of distinguished 

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AMERICAN BOOK COMPANY, 



^"EW YORK, CISfCINNATI, CHICAGO. 



Flease Mention Science. 



PROTECTION FROM LIGHTNING. 



PROSPECTUS. 



47 Lafayette Place, New York, March 9, 1891. 

 It is proposed by the owners of letters patent dated Dec. 16, 1890, on an improved 

 method for protecting buildings from lightning, etc., to organize a company for the hand- 

 ling of said patent and all improvements ; and subscriptions are requested on the following 

 terms and conditions; — 



1. A company is to be organized with a capitalization of $10,000, in 1,000 shares of $10 

 each, fully paid in at par, the company to be organized in such State as the subscribers may 

 determine by vote when all shares have been subscribed for, and with a charter to contain 

 a provision that the amount of capitalization shall never be increased. 



2. This $10,000 is to be used as working capital; and the object of the company will 

 simply be to place licenses with responsible persons, corporations, or sub-companies, at 

 such rates of royalty as may be agreed upon by a majority vote. 



3. In lieu of any stock or cash payment to the inventor for his patent, the inventor 

 will give said company the exclusive control of his said inventions in consideration of the 

 pa3rment to him by said company of one-third of the gross royalty receipts. 



The officers of the company shall be elected by a majority vote of the stockholders 

 without reserve. No stock shall be given to anybody for services or any thing else except 

 actual cash payment at par into the treasury. 



No subscriptions will be binding until the full number of 1,000 shares has been sub- 

 scribed for. 



Subscriptions are solicited in amounts from five shares upwards. The list opens with 

 subscriptions for one hundred and five shares. 



N. D. C. HODGES. 



(lycmStabie CK^ Go- 



CARP^ETS 



Scotch Axminsters, 



Royal "Wiltons, Lowell Brussels. 



PERSIAN and ORIENTAL RUGS, 



Axminster and Ambusson Carpets, 



SPECIAL DESIGNS PREPARED TO ORDER. 



Upholstery 



Rich Tapestries, Brocatelles, 



ANTIQUE LACES. 



Portieres, Curtain Materials, 



WALL COVERINGS, ARTISTIC CRETONNES. 



New and unique styles and colorings 

 for toivn and country house furnishings. 



J9tc»ac)wau ckj l^m 6t, 



IVEW YORK. 



M I M CD A 10 Cabinet Specimens. Collections. 

 lllllltnHLOi Fob Bloivpipe Analysis. 



Largest and finest stock in U. S. 100pp. Illustrated 

 Catalogue, paper bound, 15c ; cloth bound, 25c. 

 GEO. L. ENGLISH & CO, Mineralogists, 

 Removed to 733 & 735 Broadway, New York. 



Course of Mineralogy for Yonng People. 



Third Grade ready, containing directions how to 

 study minerals by means of blowpipe analysis. 



Book, Collection. Correspondence one dollar 

 postage, 25 cents. Address 



GUSTAVE GUTTENBERG, 

 Central High School, Pittsburgh, Pa. 



J. B, CRALLE & CO., 

 Washington, D. C. 



ILLCSTKATED HAND-BOOK FREE upon appli( 

 tion. Mention this paper. 



BUSINESS OPPORTUNITY. 



There is a good chance for the right man 

 as Manager of the 



LIGHTNING PROTECTION COMPANY, 



which is being formed to operate under broad 

 patents. The new method will certainly 

 revolutionize the whole system of protecting 

 property from lightning. 



Local companies are already forming to 

 operate under licenses from the parent com- 

 pany, and we should be glad to hear from 

 any who would care to consider entering this 

 new field. 



Correspondence is solicited with those de- 

 siring further information. 



N. D. C. HODGES, 47 Lafayette PL, N.Y 



