. Scientific American Volume 92 Number 04 (January 1905) . The N-Rays- The Scientific American Supple-ment has published all the argu-ments for and against the American Supple-ment 1473 tells what the N-rays American Supplement 1487 describes some of the more remarkableN-ray phenomena and shows how N-rays may be photographed. Scientific American Supplement 1491 tells of some extraordinary results ob-tained with the N-rays. Scientific American Supplement 1511 contains a skeptical article by ProfessorWood on the N-rays and a reply thereto written by Professor Blo
. Scientific American Volume 92 Number 04 (January 1905) . The N-Rays- The Scientific American Supple-ment has published all the argu-ments for and against the American Supple-ment 1473 tells what the N-rays American Supplement 1487 describes some of the more remarkableN-ray phenomena and shows how N-rays may be photographed. Scientific American Supplement 1491 tells of some extraordinary results ob-tained with the N-rays. Scientific American Supplement 1511 contains a skeptical article by ProfessorWood on the N-rays and a reply thereto written by Professor Blondlot at the request ofthe Editor of the Scientific American. Each Supplement named costs Ten Cents by mail. Order from your news-dealer or from MUNN St, CO., 361 Broadway, New York. drains arrive and/cave by ELGIN The Elgin Watch is as indis-pensable to the traveler as it isto the great railroad Elgin Watch isfully guaranteed. Alljewelers have ElginWatches. Timemakers and Time-keepers, an illustratedhistory of the watch, sentfree upon request to ELGIN NATIONAL WATCH CO.,Elgin, III. 94 Scientific American January 28, 1905. The Fay &Bowen Motor is the machine described in TheLife-Boat (of England), forAugust, 1904. as having success-fully stood the severest tests. Itis the machine which made thebe.«t record of any American mo- t tor in the English Relia- KP3flfB> bility Trials last summer • ^-™-^i- So crank or handle ? ^ used for starting. Made in single or mul-ti-cylinder reliable and controllable to its for a copy of Life-Boat test and illus-trated catalogue of motors and elegant motor-boats Fay & Bowen Engine Co., No. 80 Lake Street,Geneva, N. Y., U. S. A.
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