The Electrical Experimenter 1915-04
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=e si ‘aac a REC. U.S, PAT. OFF. & FOREIGN COUNTRIES, INSULATION. 4500 4502 4507 7370 6288 6268 ELECTROSE MFG. Co., Best Evening Course in Wireless in New York 1f you jive nearby and wish to hold your present position, while studying at night. Complete equipment— twelve instructors, Prepare for a government Iicense—under a Marcon! Engineer Day Courses in Operating and Construction Evening Courses in Engineering, Operating and Drafting. Spanish for Operators New Class in Engineering starts soon. Y. M. C. A. TELEGRAPH SCHOOL 145 East 86th Street, NEW YORK Everybody Needs “BEERS-2se-Zeez2 GIVES LONG SERVICE AT VERY LOW GOST Burns from 40 to 60 Hours Made to use acommon dry cell battery which can be boughtanywhere for 25 cents. Not a toy but a reliable, practical, electric Jantern, sure to displace the old unsafe oil lanterns and uncertain flashlights. Durable,-yhandsome, compact, abso- lutely safe. A sensible, economical article for every day use. Indis- pensable for housekeepers, auto- mobilists, farmers, sportsmen, yachtsmen, watchman, delivery- men, etc. Permanent and intermittent contact switch. ‘ungsten lamp. Imported op- ticallens. Silver plated retlector, Prices delivered anywhere in the United States No. 1005 Pressed Steel, black rubber finish, $2.00 No. 1000 Solid Brass, highly polished........ 2.50 No. 1002 Solid Brass, nickel plated........... 3.00 Dealers write quick for sample and further information THE BEERS SALES COMPANY 1008 EBROAD STREET - ~- BRIDGEPORT, CONN. i ae 1000 TO 1000000 VOLTS LOUIS STEINBERGER'’S PATENTS Adopted by U. S. NAVY and all the Commercial Wireless Telegraph Companies 60-72 Washington St. 66-76 Front St. 6839 BROOKLYN, N. Y. AMERICA CRYSTALOI The New Permanent Wireless Detector EXTREME LONG DISTANCE MICROMETRIC ADJUSTMENT This WONDERFUL LITTLE DETEC- YOR is the height of Mechanical and Electrical achievement and will simply astonish you in Its performances. IT WILL NOT BURN OUT OR GO DEAD and will last indefinitely. All elements are seuled in the little cyltin- der which is revolved to secure finest adjustment. The ‘‘Crystaloi’”’ is posi- tively the most sensitive and _thor- oughly practical detector ever designed. It is not a make-shift. It is a pre- cision instrument in every sense of the word, and is beautifully finished. EACH “CRYSTALOI” is tested for ex- treme long distance at our station, which insures the one you get being absolutely perfect or money refunded. WRITE TO-DAY for full information. Immediate delivery. Price $3.50, including postage WIRELESS DIVISION EUGENE T. TURNEY CO. 2595-B THIRD AVE., NEW YORK CITY You benefit by mentioning “The Electrical Experimenter” when writing to advertisers. = VIE PPAF
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