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To Edward Frankland   23 September 1873

Summary

Will follow EF’s suggestions as to securing purity of fibrin.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  23 Sept 1873
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9064A

From Edward Frankland   27 September 1873

Summary

Has sent CD some pure distilled water for his Drosera experiments.

Author:  Edward Frankland
Addressee:  Charles Robert Darwin
Date:  27 Sept 1873
Classmark:  DAR 164: 208
Letter no:  DCP-LETT-9076

To Edward Frankland   29 September 1873

Summary

Is sending washings of 445 leaves in EF’s distilled water with 20 grains of carbonate of soda. Details of the difficulties and complications involved.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  29 Sept 1873
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9077A

To Edward Frankland   7 October [1873]

Summary

Requests a piece of the most sensitive litmus paper in order to test the secretions of minute hairs of plants which catch minute flies. [See 9098.]

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  7 Oct [1873]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9090A

From Edward Frankland   10 October 1873

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Summary

The results of EF’s tests for acids in the secretion of Drosera are largely negative [see Insectivorous plants, p. 88].

Author:  Edward Frankland
Addressee:  Charles Robert Darwin
Date:  10 Oct 1873
Classmark:  DAR 58.1: 44–6
Letter no:  DCP-LETT-9094

To Edward Frankland   13 October 1873

Summary

Finds the negative information sent by EF of great interest [see 9094].

More on his own experiments and the perplexing results when using the sensitive litmus paper.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  13 Oct 1873
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9096A

From Edward Frankland   16 October 1873

Summary

Sends some litmus paper for CD.

Author:  Edward Frankland
Addressee:  Charles Robert Darwin
Date:  16 Oct 1873
Classmark:  DAR 164: 209
Letter no:  DCP-LETT-9098

To Edward Frankland   18 October [1873]

Summary

Apologises for his ignorance in interpreting the results secured in his testing with blue litmus paper.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  18 Oct [1873]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9100A

To Edward Frankland   [10 November 1873]

Summary

Requests permission to call upon EF either Friday or Saturday morning [14 or 15 November].

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  [10 Nov 1873]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9137A

To Edward Frankland   9 March [1874]

Summary

Requests EF’s vote and support in favour of Henry Parker for membership in the Athenaeum.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  9 Mar [1874]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9347A

To Edward Frankland   12 April 1874

Summary

Finding that the leaves of Drosera digest all the phosphate of lime out of bones and then remain clasped over the bones for a long time, CD wants to determine whether it is the phosphate of lime or the animal matter in the bones that keeps them clasped. He asks EF to send 2 or 3 grams of pure phosphate of lime for his testing. [See 9411.] Will experiment in the summer using EF’s suggestion that leaves might serve to test weak sewage. Results of Sanderson’s experiments with acids of great use.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  12 Apr 1874
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9405A

From Edward Frankland   15 April 1874

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Summary

Sends some phosphates of lime free of animal matter [see Insectivorous plants, p. 109].

Author:  Edward Frankland
Addressee:  Charles Robert Darwin
Date:  15 Apr 1874
Classmark:  DAR 58.1: 49–50
Letter no:  DCP-LETT-9411

To Edward Frankland   17 April 1874

Summary

Thanks for the pure phosphate of lime.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  17 Apr 1874
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9415A

To Edward Frankland   22 April [1874]

Summary

Requests permission to call briefly to discuss Drosera.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  22 Apr [1874]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9424A

From Edward Frankland   26 April 1874

Summary

Bullfinches’ instinctive capacity for removing nectaries from cowslips.

Author:  Edward Frankland
Addressee:  Charles Robert Darwin
Date:  26 Apr 1874
Classmark:  DAR 164: 210
Letter no:  DCP-LETT-9430

To Edward Frankland   28 April [1874]

Summary

Thanks for letter relating to domesticated bullfinches’ instinctively cutting off cowslips [see 9430]. Suggests observing whether the birds swallow any part of flower or particular parts.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  28 Apr [1874]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9432A

From Edward Frankland   30 April 1874

Summary

Variation in bullfinches’ instinctive ability to remove nectaries and ovaries from cowslips.

Author:  Edward Frankland
Addressee:  Charles Robert Darwin
Date:  30 Apr 1874
Classmark:  DAR 164: 211
Letter no:  DCP-LETT-9435

To Edward Frankland   14 May [1874]

Summary

Requests sewage water (and oleic acid) for experiments to determine sensitivity of leaves [of Drosera].

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  14 May [1874]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9460A

To Edward Frankland   20 May [1874]

Summary

Thanks for the sewage water and the oleic acid. The former does not seem to act.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  20 May [1874]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9462A

To Edward Frankland   22 July 1874

Summary

Asks for the specific gravity of common phosphate of ammonia.

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  22 July 1874
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-9559A
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1874 (14)
1875 (2)
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