70 



SCIENCE. 



THE 



M Te 



COMPANY. 



128 MILK ST., BOSTON, MASS. 



This Company owns the Letters - Patent 

 No. 186,787, granted to Alexander Graham 

 Bell, January 30th, 1877, the scope of which 

 has been defined by the Supreme Court of 

 the United States in the following terms: 



"The patent itself is for the mechanical 

 structure of an electric telephone to be used 

 i;o produce the electrical action on which the 

 iirst patent rests. The third claim is for the 

 use in such instruments of a diaphragm, 

 made of a plate of iron or steel, or other ma- 

 terial capable of inductive action ; the fifth, 

 of a permanent magnet constructed as de- 

 scribed with a coil upon the end or ends 

 nearest the plate; the sixth, of a sounding 

 box as described; the seventh, of a speaking 

 or hearing tube as described for conveying 

 the sounds; and the eighth, of a permanent 

 magnet and plate combined. The claim is 

 not for these several things in and of them- 

 selves, but for an electric telephone in the 

 construction of which these things or any of 

 them are used." 



This Company also owns Letters-Patent 

 No. 463,569, granted to Emile Berliner, No- 

 vember 17, 1891, for a combined Telegraph 

 and Telephone, and controls Letters-Patent 

 No. 474,331, granted to Thomas A. Edison, 

 May 3, 1892, for a Speaking Telegraph, 

 which cover fundamental inventions and 

 embrace all forms of microphone transmit- 

 ters and of carbon telephones. 



BUSIiNESS OPPORTUNITY. 



There is an opening for a 

 young man to open a New 

 York office of the American 

 Lightning Protection Co., 

 operating under my patents. 

 But little capital will be re- 

 quired. 



N. D. C. HODGES, 



874 BROADWAY, NE W YORK 



SOFTLY STEALS THE LIGHT OF DAY 



■when filtered through windows covered with 



CRYSTOGRAPHS, 



SOc. per square foot. Samples and catalogue, 10c. 



CRYSTOORiPH CO., 



316 Nortb Broad St.,° i^tldcl'elpbla. 



LIGHTNING DESTROYS! 



Shall it be your house or a 

 pound of copper? 



Entirely new departure in pro- 

 tecting buildings from lightning. 

 Onehundredfeetof the Hodges 

 Patent Lightning Dispeller 

 (made under patents of N. D. C. 

 Hodges, Editor of Science) will 

 be sent, prepaid, to any ad- 

 dress, on receipt of five dollars. 



Correspondence solicited. Agents wanted, 



AMERICAN LIGHTNING PROTECTION CO., 



874 Broadway, New York City. 



Fact and Theory Papers 



[Vol. XXII. No. 548 



QUERY. 



I. THE SUPPRESSION OF CON- 

 SUMPTION. By GODFKEY W. Hambleton, M.D. 

 12°. 40c. 



II. THE SOCIETY AND THE " FAD." 



By Apfleton Morgan, Ksq. 13°. 20 cents. 



III. PROTOPLASM AND LIFE By 



C. p. cox. 12°. 75 cents. 



IV. THE CHEROKEES IN PRE-CO- 



LUMBIAN TIMES. By CTBnS THOMAS. 13°. SI. 



V. THE TORNADO. By H. A. Hazen. 



13°. $1. 



VI. TIME-RELATIONS OF MENTAL 



PHENOMENA. By JOSEPH JASTBOW. 13°. 50c. 



VII. HOUSEHOLD HYGIENE. By 

 Mary Tatlok Bissell. 13°. 75 cents. 



N. D. C. HODGES, Publisher, 



S74 Broadway, New York. 



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, H. Y. 



SCIENCE CLUBBING RATES. 



lOfo DISCOUNT. 



We will allow the above discount to any 

 subscriber to Science who will send us an 

 order for periodicals exceeding SIO, counting 

 each at its full price. 



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



*'BUSY FOLKS' GYMNASIUfl." 



J — 



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 young, /t 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. 



Educated agents wanted. Physi 



CAL Culture Chart, with illustrated directions for de- 

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

 naming this paper. 



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



