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To Hermann Müller   5 May 1873

Summary

Comments on HM’s book [Die Befruchtung der Blumen (1873)]. Particularly glad to read historical sketch and discussion of work of C. K. Sprengel.

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  5 May 1873
Classmark:  DAR 146: 434
Letter no:  DCP-LETT-8901

From Hermann Müller   19 May 1873

Summary

Praises Expression.

Reports on Fritz Müller’s observations of cross- and self-fertilisation. HM will cultivate the two forms [i.e., mainly self-fertilised and mainly cross-fertilised] in the way CD has described.

He continues his observation of wild flowers. Encloses drawing of Viola tricolor with notes on its self-fertility.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  19 May 1873
Classmark:  DAR 76: B181–2, DAR 77: 139
Letter no:  DCP-LETT-8907

From Hermann Müller   12 May 1873

Summary

Thanks for CD’s praise of his book [see 8901].

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  12 May 1873
Classmark:  DAR 171: 300
Letter no:  DCP-LETT-8909

From Hermann Müller   27 May 1873

Summary

Poa annua shows putative evidence of nectar secretion in grasses. He will continue observations as CD requests.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  27 May 1873
Classmark:  DAR 171: 301
Letter no:  DCP-LETT-8923

To Hermann Müller   30 May 1873

Summary

Further comments on HM’s [Befruchtung der Blumen (1873)].

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  30 May 1873
Classmark:  DAR 146: 435; Krause 1884, p. 27
Letter no:  DCP-LETT-8929
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letter (5)
Correspondent