Bureau of Standards speeds up photomicrography with new apparatus. Was...
Picryl description: Public domain image of a picnic in the park, outdoor activity, leisure time, free to use, no copyright restrictions.
Telegram from Emile Berliner to Roy M. Allen, 1926?
Appears to relate directly to rest of 1926 correspondence between Berliner and Allen. Holograph, signed--may be copy. Contains suggestion to help Allen capture image of microphonic air-gap.
Letter from Roy M. Allen to Emile Berliner, 1926 Nov. 5
Handwritten postscript.
Letter from Roy M. Allen to Emile Berliner, 1926 Nov. 17
Allen's sketch of microphonic air-gap at the bottom of page 3. Continues with a handwritten postscript on p. 4. Contains Allen's thoughts on the proposed article for which he and Berliner have been trying to ca... More
Letter from W. L. Richards to Emile Berliner, 1926 Nov. 8
Holograph, signed.
Telegram from Emile Berliner to Roy M. Allen, 1926?
Appears to relate directly to rest of 1926 correspondence between Berliner and Allen. Holograph, signed--may be copy. Contains suggestion to help Allen capture image of microphonic air-gap.
Letter from Emile Berliner to Roy Allen, 1926 Oct. 6
Carbon copy. Doodles on recto.
Letter from W. L. Richards to Emile Berliner, 1926 Nov. 11
Bell Telephone Laboratories letterhead. Letter from W. L. Richards detailing his suggested corrections to a book (or manuscript?) Berliner had written and sent to him for his approval.
Letter from Emile Berliner to Roy Allen, 1926 Oct. 6
Carbon copy. Doodles on recto.
Telegram draft? from Emile Berliner to Roy M. Allan (sic), 1926 Oct. 2...
Handwritten. May possibly be unfinished.
Letter from Roy M. Allen to Emile Berliner, 1926 Nov. 11
Handwritten postscript.
Telegram draft? from Emile Berliner to Roy M. Allan (sic), 1926 Oct. 2...
Handwritten. May possibly be unfinished.
Letter from W. L. Richards to Emile Berliner, 1926 Nov. 11
Bell Telephone Laboratories letterhead. Letter from W. L. Richards detailing his suggested corrections to a book (or manuscript?) Berliner had written and sent to him for his approval.
Telegram from Emile Berliner to Roy M. Allan (sic), 1926 Oct. 23?
Date taken from context and sequence of letters.
Letter from W. L. Richards to Emile Berliner, 1926 Nov. 5
Holograph, signed.
Letter from Roy M. Allen to Emile Berliner, 1926 Nov. 5
Handwritten postscript.
Letter from Roy M. Allen to Emile Berliner, 1926 Nov. 17
Allen's sketch of microphonic air-gap at the bottom of page 3. Continues with a handwritten postscript on p. 4. Contains Allen's thoughts on the proposed article for which he and Berliner have been trying to ca... More
Letter from Roy M. Allen to Emile Berliner, 1926 Nov. 17
Allen's sketch of microphonic air-gap at the bottom of page 3. Continues with a handwritten postscript on p. 4. Contains Allen's thoughts on the proposed article for which he and Berliner have been trying to ca... More
Telegram from Emile Berliner to Roy M. Allan (sic), 1926 Oct. 23?
Date taken from context and sequence of letters.
Letter from W. L. Richards to Emile Berliner, 1926 Nov. 11
Bell Telephone Laboratories letterhead. Letter from W. L. Richards detailing his suggested corrections to a book (or manuscript?) Berliner had written and sent to him for his approval.
