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To John Tyndall   20 October [1875]

Summary

JT’s tube [of boiled infusion] dated 16 Oct was clear on 19th; on the 20th it was muddy and contained many bacteria in living movement.

Author:  Charles Robert Darwin
Addressee:  John Tyndall
Date:  20 Oct [1875]
Classmark:  Sue and Gerald M. Friedman (private collection)
Letter no:  DCP-LETT-10207

To John Tyndall   25 October [1875]

Summary

Asks JT to send the tubes [of boiled infusions]. Frank Darwin will do his best. Asks for full instructions.

Author:  Charles Robert Darwin
Addressee:  John Tyndall
Date:  25 Oct [1875]
Classmark:  DAR 261.8: 23 (EH 88205961)
Letter no:  DCP-LETT-10222

From John Tyndall   23 October [1875]

Summary

Asks whether he may send two or three other tubes [of boiled infusions] to be placed in the open and observed for him.

Author:  John Tyndall
Addressee:  Charles Robert Darwin
Date:  23 Oct [1875]
Classmark:  DAR 106: C19
Letter no:  DCP-LETT-10218
Document type
letter (3)
Addressee
Correspondent
Darwin, C. R.[X]
Tyndall, John[X]
Date
1875
10
20 (1)
23 (1)
25 (1)
letter