bell system technical journal april (12 resultados)

Soft cover. Condición: Poor. Very worn copy but pages complete and still readable. Back cover missing. The spine is barely intact with pages beginning to separate. Pages lightly toned (age tanned). Previous owner's signature on the front cover and again on the first page. Some foxing (age spotting) on first few, last few pages. Water stains to last 2/3s or so of pages. Front cover soiled, toned, and with some chips and tears. Will be bubble-wrapped and carefully packed in a sturdy box to ensure safe transit. This issue includes: "Joint Meeting of the Institution of Electrical Engineers and the American Institute of Electrical Engineers"; "Transatlantic Telephony--The Technical Problem"; "Transatlantic Telephony--Service and Operating Features"; "Phase Distortion and Phase Distortion Correction"; "High-Speed Ocean Cable Telegraphy"; "The Present Status of Wire Transmission Theory and Some of its Outstanding Problems"; "Contemporary Advances in Physics--XV: The Classical Theory of Light, First Part"; "Recent Developments in the Process of Manufacturing Lead-Covered Telephone Cable"; "Bridge for Measuring Small Time Intervals"; "A Method of Rating Manufactured Product"; "Abstracts of Technical Papers" and "Contributors to this Issue".

Soft cover. Condición: Good. No Jacket. First. Pages 455-582, with full markings, pocket, and/or bookplate, wear and soil. Weight is 1 lb. Ex-Library Size: 8vo. Book.

Wraps. Condición: Very Good.

Condición: VG. NY 1933 first edition. ATT. Original blue printed wraps. Schelleng article on pp. 125-161. Other articles in issue as well. Issue paginated 125-249. VG some toning and wear on backstrip. no ownership marks.

Condición: Good. New York 1931 first edition. American Telephone and Telegraph. Original printed green wraps. large octavo. Symposium on pp. 155-264 with additional articles in the issue on other topics. Foldout map of radio telephone circuits in the world. Good, cover rubbed and somewhat worn. Binding secure and text clean . no ownership marks.

Paperback. Condición: Very Good. No Jacket. American Telephone and Telegraph Company, 1971, 8vo, photos, illustrations. Softcover edition, in very good condition. Size: 8vo - over 7¾" - 9¾" tall.

Hardcover. Condición: Very Good+. Original issue. All four issues for 1925, bound complete (without covers) into full blue cloth, 767 pp, errata slip, illustrated with black and white drawings and photographs + 6 fold-outs. Hardcover, very good to near fine. Minor soil on cloth, spine faded, paper lightly age yellowed, 1 inch smudge on upper corner of first free front endpaper, lower corner there creased, otherwise tight, clean, paper crisp, unmarked and apparently never read. Includes articles on the transmission of pictures over telephone lines by television pioneers Herbert E. Ives and J. W. Horton which includes a 3 color photograph that was transmitted, as well as black and white photographs of Calvin Coolidge's inauguration, advances in physics: electricity in gases, the atom model, propagation of electric waves over the earth, creosote plants for treating chestnut poles with 31 interesting photos showing logging using both oxen and locomotives for hauling, the plants, etc. (a response to the accelerating loss of chestnut tress due to the blight, noting that 200,000 trees were used each year for telephone poles) , biographical sketch of Oliver Heaviside, transatlantic radio telephone transmission, speech (human voice) , etc. Science; technology; electricity; communications; AT&T; Bell Labs; quantum mechanics; mathematics; radio.

Paperback. Condición: Good. ORIGINAL ISSUE. Offprint from the Bell System Technical Journal. Original covers, 6x9 inches, 9 pp + 44 pp + 12 pp + 17 pp + 20 pp, illustrated with black and white drawings and photographs, punched for 3-ring binder. Paperback, good. Moderate shelf wear, some soil on covers with an approximately ½ to 1 deep water (? ) stain along margins of front cover and three or four adjoining leaves, closed tear on spine, 3 inch crease of side edge of one leaf, previous owner's notations (in pencil) on first page, otherwise tight, clean, paper crisp, unmarked. Papers are: Television / Herbert E. Ives -- The production and utilization of television signals / Frank Gray, J. W. Horton, R. C. Mathes -- Synchronization of television / H. M. Stoller, E. R. Morton -- Wire transmission system of television / D. K. Gannett, E. I. Green -- Radio transmission for television / Edward L. Nelson. One of the pioneering and most important works on the development of television and the landmark transmissions along both wire (cable) from Washington, DC and "radio" (air) from Whippany, New Jersey. Science; technology; TV; electricity; history.

Condición: VG. New York 1934 first edition. ATT. Blue octavo wraps. Goucher article on pp. 163-194 with several photo illustrations of microphones and other machines. VG++ almost no wear; no ownership marks; clean.

Condición: VG. New York 1934 first edition. ATT. Blue octavo wraps. Symposium articles on pp. 239-308 with several photo illustrations. Articles on Amplifiers; Loud Speakers and Microphones; transmission lines, etc. VG ++ almost no wear; no ownership marks. clean.

Soft cover. Condición: Good. Softcover, 10 by 6 3/4 inches, paginated 187-348, illustrated. Covers have slight wear. Front cover has markings in red pencil, penned note. Head of spine has inch missing, 1/4 inch chip to foot of spine. pages clean. Article on transmission of pictures over telephone lines. Includes color reproduction of photo sent this way. I will not ship this overseas.

The fundamental paper introducing the idea of error correction in communication and computer systems. A simple version of the Hamming Code in use today is the familiar "parity check" method for detecting memory and transmission errors. Octavo. The complete volume, in original printed wrappers. Spine cocked and a bit stained, library rubberstamp on front cover. Light dampstain at fore-edge of first few leaves. A good copy. Hook and Norman, 646. See Lee, Computer Pioneers, pp. 360-6.