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Highlights
Bell Notebooks Project Volume 1
Title Page
Opening Page to Bell's Notebooks, Volume I
Autumn 1875
Experiments with Reed Receivers and Electromagnets
Pages: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
February 19th, 1876
Cylinder transmitter, Magnet core, Parlor-organ
Pages: 14, 15, 16, 17.
February 21st, 1876
Autograph arm based on ossicles
Page: 17.
February 22nd, 1876
Armature/electromagnet experiments (variations on reed receiver, transmitter)
Pages: 18, 19, 20, 21, 22, 23, 24, 25, 26.
February 23rd, 1876
Autograph style, Manometric capsule/"Flame Galvanometer," New transmitter (permanent magnet)
Pages: 27, 28, 29.
February 24th, 1876
Manometric capsule experiments
Pages:30, 31, 32, 33, 34.
March 8th, 1876
Tuning fork experiments
Pages: 35, 36, 37, 38.
March 9th, 1876
Beginnings of speech transmission
39.
March 10th, 1876
"Mr. Watson - Come here..." and other early speech transmission. Re-experimenting with acidulated-water models, New receiver plan
Pages: 40, 41, 42, 43, 44, 45.
March 11th, 1876
Iron Cylinder Receiver
Page: 46.
March 12th, 1876
The Variable-Resistance Design, Splashguard Transmitter, Phonautograph piece, Double-dip transmitter.
Pages: 47, 48, 49.
March 13th, 1876
More Speech: Splashguard Variable Resistance Transmitter, Transmitted phrases
Pages: 49, 50, 51, 52.
March 14th, 1876
Automatic Transmitter, Liquid Transmitter Experiments, liquid rotation noticed, Mouthpiece faulted, New transmitter sketched
Pages: 52, 53, 54, 55, 56.
March 15th, 1876
Decision to pursue Theory
Page: 57.
March 20th, 1876
Theoretical Investigations re:effects of resistance on current; Ohm's law manipulations
Pages: 57, 58, 59, 60, 61, 62, 63, 64, 65.
March 20th, 1876
Experiments on liquid transmitter / iron cylinder receiver
Pages: 66, 67.
March 23rd, 1876
Experiments after reading Culley: variations on the liquid transmitter
Pages: 67, 68, 69, 70, 71, 72.
March 24th, 1876
Experiments with Foil and Wire, alone and in transmitter
Pages: 73, 74, 75, 76, 77, 78.
March 27th, 1876
Transmitter and Receiver variations
Pages: 78, 79, 80, 81, 82, 83.
April 1st, 1876
Transmitter and receiver configurations, continued.
Pages: 83, 84, 85, 86 87.
April 2nd, 1876
Plumbago added to transmitter
Pages: 88, 89, 90.
April 5th, 1876
Experiments: undulatory current confirmed superior; sparks noticed
Pages: 91 92 93 94 95 96 97
April 7th, 1876
Thoughts on Autograph Telegraph films
Pages: 98, 99, 100,
April 10th, 1876
Ink tsts; speculations about circuits
Pages: 100, 101.
April 11th, 1876
Speech experiments: no consonants
Pages: 102, 103.
April 13th, 1876
Looking for good conduting ink, Plumbago experiments
Pages: 104, 105, 106.
April 15th, 1876
Mixed autograph and voice notes
Pages: 106, 107.

Volume 1 Bell Notebooks Project
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Charles R. Twardy
ctwardy@indiana.edu