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To J. T. Moggridge   10 March 1873

Summary

Much obliged for seeds. Will expose seeds to chemical vapours.

Comments on JTM’s spider experiments.

Author:  Charles Robert Darwin
Addressee:  John Traherne Moggridge
Date:  10 Mar 1873
Classmark:  DAR 146: 379
Letter no:  DCP-LETT-8805

To J. T. Moggridge   27 August 1873

Summary

Comments on experiments of touching seeds with acid.

Author:  Charles Robert Darwin
Addressee:  John Traherne Moggridge
Date:  27 Aug 1873
Classmark:  DAR 146: 380
Letter no:  DCP-LETT-9030

From J. T. Moggridge   1 February 1873

Summary

He does not accept Wallace’s definition of instinct because it excludes "inherited experience", i.e., "knowledge acquired by and transmitted through ancestors".

House-flies do not seem to have an instinctive fear of trap-door spiders.

Miss Forster gives him news of CD.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  1 Feb 1873
Classmark:  DAR 171: 217
Letter no:  DCP-LETT-8756

From J. T. Moggridge   12 July 1873

Summary

Sends his paper on Ophrys insectifera, translated into German by H. G. Reichenbach [Abh. Kais. Leopold.-Carol. Dtsch. Akad. Naturforsch. 33 (1870) no. 3], which shows the intermediates between O. aranifera and O. apifera. He has since gathered information on variation in Ophrys.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  12 July 1873
Classmark:  DAR 171: 218
Letter no:  DCP-LETT-8977

From J. T. Moggridge   22 July 1873

Summary

He will repeat the experiments in which CD found that formic acid vapour killed seeds [see 8866]. John Lindley describes effects of other acids on germination.

He has tabulated the large amount of variation in English Ophrys apifera.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  22 July 1873
Classmark:  DAR 171: 219
Letter no:  DCP-LETT-8984

From J. T. Moggridge   24 July 1873

Summary

CD has clarified the way to conduct the formic acid experiment.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  24 July 1873
Classmark:  DAR 171: 220
Letter no:  DCP-LETT-8986

From J. T. Moggridge   30 July 1873

Summary

His preliminary results with formic acid show that it inhibits germination of several kinds of seed. It also inhibits growing of mildew, which he speculates may facilitate germination.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  30 July 1873
Classmark:  DAR 171: 221
Letter no:  DCP-LETT-8990

From J. T. Moggridge   22 August 1873

Summary

He has added carbolic acid to the seed germination experiments and sends more results on the effect of formic acid. Formic acid inhibits mildew on dough but not on seeds.

Mildew never grows in ants’ nests.

Sends an account, from the Mishnah, of grain stored by ants.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  22 Aug 1873
Classmark:  DAR 171: 222
Letter no:  DCP-LETT-9024

From J. T. Moggridge   4 November 1873

Summary

Formic acid kills seeds but only rarely makes them dormant – as he presumes ants do. He finds great variation in the vigour of individual seeds. Harvester ants, used in place of formic acid, do not affect germination.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  4 Nov 1873
Classmark:  DAR 171: 223
Letter no:  DCP-LETT-9133
Document type
letter (9)
Correspondent
Darwin, C. R.[X]
Moggridge, J. T.[X]
Date
1873
02 (1)
03 (1)
07 (4)
08 (2)
11 (1)
letter