The resonance effects obtained during the operation of a Tesla coil are very marked, and their study may lead to the solution of the problems of communication between distant points without the use of other conducting media than the atmosphere. But the main use to which the Tesla currents have been put is that of artificial illumination. These currents have enabled experimenters to obtain a high luminosity in vacua by the aid of only one conducting wire - in fact, in some cases without the utilization of any conductor than the air. An ordinary incandescent lamp connected to one terminal of the coil will show in a fair degree some of the luminescent phenomena. The brush effects from the terminals of the secondary coil are extremely marked and interesting; but to detail the experiments that can be performed with the Tesla disruptive coil would be an impossibility here. Reference is recommended to the published works of Nikola Tesla, which happily are readily procurable.

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For sale: POLE TRANSFORMERS, 14.4 KV @ 10 KVA, $60 per unit (pickup at our shop) or add $30 per unit for crating, lumber, labor costs. Shipping runs around $150-180 in the U.S.A. Resonance Research, E11870 Shadylane Road, Baraboo, Wisconsin 53913.

For sale: The TCBA INDEX, Volume 1, through Volume 18, #4, on computer disk or hard copy. The index allows quick reference to most any article or comment ever to appear in the newsletter. For more information, send an SASE to Robert Wroblewski, 32 Barton Ave., Dracut, MA 01826-2204 or email [email protected].

For sale: THE ONLY REMAINING RECORDS IN AMERICA FROM NIKOLA TESLA'S LABORATORIES! Bills receipts, legal statements, etc. addressed to the Houston Street Laboratory in N.Y. City, the Colorado Springs experimental station, and the Wardenclyffe station on Long Island, NY. Even includes bills for several hundred rounds of .22 caliber shells (what were these used for?). Seller desires collection to be purchased by a private individual rather than an institution where it may no longer be available to the historian. Price is $2500 plus shipping by Federal Express unless otherwise advised. Payment to be made by cash, electronic deposit or Cashier's Check (no personal or company checks) to Leland Anderson. Those with interest in this transaction may write to Leland Anderson, 2525 S. Meade St., Denver, CO 80219. Fax (303) 075-0820.

Literature Received

C&H SALES CO., 2176 E. Colorado Blvd., Pasadena, CA 91107. Offers a 150 page catalog of electro-mechanical devices.

HERBACH & RADEMAN, 16 Roland Ave., Mt. Laurel, NJ 08054. Sends out a catalog titled “This Month.” Issue 1999, #4 consists of 113 pages of electro-mechanical surplus items.

AMERICAN SCIENCE & SURPLUS issues a monthly catalog of doodads among which subscribers will find a handy item or two. 3605 Howard St., Skokie, IL 60076