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Bell Notebooks Project
Volume 1
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 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
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March 8th, 1876
Tuning fork experiments
Pages:
35
,
36
,
37
,
38
.
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 13th, 1876
More Speech: Splashguard Variable Resistance Transmitter, Transmitted phrases
Pages:
49
,
50
,
51
,
52
.
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
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March 23rd, 1876
Experiments after reading Culley: variations on the liquid transmitter
Pages:
67
,
68
,
69
,
70
,
71
,
72
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April 7th, 1876
Thoughts on Autograph Telegraph films
Pages:
98
,
99
,
100
,
Volume 1
Bell Notebooks Project
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Charles R. Twardy
ctwardy@indiana.edu
