Published articles, typescripts, and other materials relating to telephony

The Faller Semi-automatic Telephone Exchange System, pamphlet, front cover, recto

The Faller Semi-automatic Telephone Exchange System, pamphlet, front cover, verso

The Faller Semi-automatic Telephone Exchange System, pamphlet, blank page

The Faller Semi-automatic Telephone Exchange System, pamphlet, image of Faller sender

The Faller Semi-automatic Telephone Exchange System, pamphlet, f. 1r

The Faller Semi-automatic Telephone Exchange System, pamphlet, f. 1v

The Faller Semi-automatic Telephone Exchange System, pamphlet, f. 2r

The Faller Semi-automatic Telephone Exchange System, pamphlet, f. 2v

The Faller Semi-automatic Telephone Exchange System, pamphlet, p. 3

The Faller Semi-automatic Telephone Exchange System, pamphlet, p. 4

The Faller Semi-automatic Telephone Exchange System, pamphlet, blank page

The Faller Semi-automatic Telephone Exchange System, pamphlet, image of section 36-37 in west exchange

The Faller Semi-automatic Telephone Exchange System, pamphlet, closed foldout, recto

The Faller Semi-automatic Telephone Exchange System, pamphlet, open foldout

The Faller Semi-automatic Telephone Exchange System, pamphlet, closed foldout, verso

The Faller Semi-automatic Telephone Exchange System, pamphlet, p. 5

The Faller Semi-automatic Telephone Exchange System, pamphlet, p. 6

The Faller Semi-automatic Telephone Exchange System, pamphlet, f. 7r

The Faller Semi-automatic Telephone Exchange System, pamphlet, f. 7v

The Faller Semi-automatic Telephone Exchange System, pamphlet, p. 8

The Faller Semi-automatic Telephone Exchange System, pamphlet, p. 9

The Faller Semi-automatic Telephone Exchange System, pamphlet, addenda, recto

The Faller Semi-automatic Telephone Exchange System, pamphlet, addenda, verso

The Faller Semi-automatic Telephone Exchange System, pamphlet, back cover, recto

The Faller Semi-automatic Telephone Exchange System, pamphlet, back cover, verso

Report on the Faller automatic telephone operator, pamphlet, front page, recto

Report on the Faller automatic telephone operator, pamphlet, front page, verso

Report on the Faller automatic telephone operator, pamphlet, p. 3

Report on the Faller automatic telephone operator, pamphlet, p. 4

Report on the Faller automatic telephone operator, pamphlet, p. 6

Report on the Faller automatic telephone operator, pamphlet, p. 7

Report on the Faller automatic telephone operator, pamphlet, p. 8

Report on the Faller automatic telephone operator, pamphlet, p. 9

Report on the Faller automatic telephone operator, pamphlet, p. 10

Report on the Faller automatic telephone operator, pamphlet, p. 11

Report on the Faller automatic telephone operator, pamphlet, p. 12

Report on the Faller automatic telephone operator, pamphlet, p. 13

Report on the Faller automatic telephone operator, pamphlet, p. 14

Report on the Faller automatic telephone operator, pamphlet, p. 15

Report on the Faller automatic telephone operator, pamphlet, p. 16

Description of the Strowger automatic telephone exchange of Fall River, Mass., off print, recto

Description of the Strowger automatic telephone exchange of Fall River, Mass., off print, verso

Description of the Strowger automatic telephone exchange of Fall River, Mass., off print, recto

Description of the Strowger automatic telephone exchange of Fall River, Mass., off print, verso

Collection of different images including circuit diagrams, photographs, and maps, recto

Collection of different images including circuit diagrams, photographs, and maps, verso

The Electrical Age, clipping, p. 359

The Electrical Age, clipping, p. 360

Description of the Telephone-Herald, pamphlet, front page, recto

Description of the Telephone-Herald, pamphlet, front page, verso

Description of the Telephone-Herald, pamphlet, p. 2

Description of the Telephone-Herald, pamphlet, p. 3

Description of the Telephone-Herald, pamphlet, p. 4

Description of the Telephone-Herald, pamphlet, p. 5

Description of the Telephone-Herald, pamphlet, p. 6

Description of the Telephone-Herald, pamphlet, p. 7

Description of the Telephone-Herald, pamphlet, p. 8

Description of the Telephone-Herald, pamphlet, p. 9

Description of the Telephone-Herald, pamphlet, end page, recto

Description of the Telephone-Herald, pamphlet, end page, verso

Typescript related to the Strowger system, [f. 1r]

Typescript related to the Strowger system, [f. 1v]

Typescript related to the Strowger system, [f. 2r]

Typescript related to the Strowger system, [f. 2v]

Typescript related to wiring schemes, [f. 1r]

Typescript related to wiring schemes, [f. 1v]

Typescript related to wiring schemes, f. 2r

Typescript related to wiring schemes, f. 2v

Typescript related to wiring schemes, f. 3r

Typescript related to wiring schemes, f. 3v

Typescript related to wiring schemes, f. 4r

Typescript related to wiring schemes, f. 4v

Typescript related to wiring schemes, f. 5r

Typescript related to wiring schemes, f. 5v

Typescript related to wiring schemes, f. 6r

Typescript related to wiring schemes, f. 6v

Typescript related to wiring schemes, f. 7r

Typescript related to wiring schemes, f. 7v

Typescript related to wiring schemes, f. 8r

Typescript related to wiring schemes, f. 8v

Typescript related to wiring schemes, f. 9r

Typescript related to wiring schemes, f. 9v

Typescript related to wiring schemes, f. 10r

Typescript related to wiring schemes, f. 10v

Typescript related to wiring schemes, f. 11r

Typescript related to wiring schemes, f. 11v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, subject-matter index, recto

Prospectus of the Ries automatic gravity-switch telephone system, typescript, subject-matter index, verso

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 1r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 1v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 2r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 2v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 3r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 3v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 4r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 4v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 5r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 5v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 6r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 6v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 7r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 7v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 8r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 8v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, [f. 9r]

Prospectus of the Ries automatic gravity-switch telephone system, typescript, [f. 9v]

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 10r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 10v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 11r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 11v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 12r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 12v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 13r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 13v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 14r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 14v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 15r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 15v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, [f. 16r]

Prospectus of the Ries automatic gravity-switch telephone system, typescript, [f. 16v]

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 17r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 17v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 18r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 18v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 19r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 19v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 20r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 20v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 21r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 21v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 22r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 22v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 23r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 23v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 24r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 24v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 25r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 25v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 26r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 26v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 27r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 27v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, [f. 28r]

Prospectus of the Ries automatic gravity-switch telephone system, typescript, [f. 28v]

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 30r

Prospectus of the Ries automatic gravity-switch telephone system, typescript, f. 30v

Prospectus of the Ries automatic gravity-switch telephone system, typescript, end page, recto

Prospectus of the Ries automatic gravity-switch telephone system, typescript, end page, verso

Scientific American, clipping, p. 508

Scientific American, clipping, p. 507