.^\ 



SCIE 



lEntered at the Posi-Offlce of New York, N.Y ., as Second-Class ' '6*jjo^ 



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Ninth Year. 

 Vol. XVII. No. 434. 



^»0f. 



NEW YOKK, Mat 29, 1891. 



W^j 



Ten Cents. 



$3.50 x^- "''■'7 ^,' IN Advance. 



OUR COMMON BIRDS, AND HOW TO KNOW THEM. 



By John B. Grant. With 64 full-page 

 illustrations from photographs. Ob- 

 long i2mo, $1.50 net 



Mr. Grant's volume will fill a vacant place among 

 popular books relating to out-of-door life. Its aim is to 

 describe, for purposes of identification, the common 

 Inrds of America. To this end sixty-four full-page il- 

 lustrations, reproduced from photographs, are given; 

 and accompanying each is a description of the bird's 

 plumage, habits, habitat, and such other information as 

 %vould be helpful in aiding one to recognize the familiar 

 songsters. 



"Haody, comprehensive, and readily intelligible. Certainly 



for people who are to pass the summer in the country one could 



hardly devise a more profitable and enjoyable occupation than 



that made possible by the aid of Mr. Grant's ingenious volume." 



iced^. — Boston Beacon. 



(Eedi 



*** The above book for sale by all booksellers, or sent postpaid on receipt of price, by 



CHARLES SCRIBNER'S SONS, 743-745 Broadway, N. Y. 



PROTECTION FROM LIGHTNING. 



THE NEW METHOD STANDS UNCRITICISED. 



' ' The main point which I would urge upon your consideration is that by giving the 

 electrical energy something which experience shows it will readily dissipate, that is, a 

 conductor of varying resistance and small size, we can but mitigate the effects of lightning- 

 discharges, so long as the conservation of energy holds true. I V7i\\ only repeat that I 

 have so far found no case on record where the dissipation of such a conductor has failed 

 to protect the building under the conditions already explained." — From paper read be- 

 fore the American Institute of Electrical,Engineers, April 21. 



A full report of the above paper and discussion will be sent to any address on application. 



PROSPECTUS. 



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



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

 method for protecting buildings from lightning, etc., to orsranize 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, corporatioils, or sub-companies, al 

 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 

 payment 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 liijiidrecl and Hlty-flve shares. 



The names of those who have subscribed will be sent to any intending subscriber upon 

 application. 



N. D. C. HODGES. 



Protection ftw Lightning 



To dissipate the energy of a lightning dis- 

 charge, — to prevent its doing harm, — it is 

 necessary that something should be placed in 

 its path upon which its energy (capacity for 

 causing damage) may be expended. The 

 Patent Lightning Dispeller is specially de- 

 signed to serve this purpose, and will be 

 sent prepaid, with full directions for its ap- 

 plication, to any part of the United States on 

 receipt of $5.00. 



No recorded case of lightning stroke has 

 yet been cited against the principle of the 

 Dispeller. So far as known, the dissipation 

 of a conductor has invariably protected under 

 the conditions employed. 



Coi'respoudence solicited. 



AGENTS WANTED 



N. D. C. HODGES, 



47 Lafayette Place, N. Y. 



M I M [■ D A I C Cabinet Specimens. Collections. 

 Ill 1 11 L n n Lu ■ For Blowpipe Analysis. 



Largest and. finest stock id U. S. )00pp. Illustrated 

 Catalo-jup. paper bound, loc : cloth bound, 25c. 



GEO. L. ENGLISH & CO, Mineralogists, 

 Removed to 733 & 735 Broadway, New York. 



J. B. CRALLE & 

 Washington, D. C. 



ILLOSTRATED HAND-BOOK FREE upon applica- 

 tion. Mention this paper. 



ESTERBROOK'S 

 STEEL PENS. 



01 SUPERIOR AND STANDARD QUALITY. 

 Leading Nos.: 048, 14, 130, 135, 239, 333 



For Sale btj all Stationers. 



THE ESTERBROOK STEEL PEN CO., 



Works: Oamden, N. J. 'iS John St., New York. 



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. 



Those interested should send for report of 

 the meeting of the American Institute of 

 Electrical Engineers, held April 31. 



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. 



The English patent, which has just been 

 received, is for sale. 



Correspondence is solicited with those de 

 siringfurther inf oiination . 



N. D. C. HODGES, 47 Lafayette Pl„ N.Y. 



