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Müller, Hermann in author 
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From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
8 Mar 1870
Source of text:
DAR 171: 296
Summary:

HM intends studying bees to find evidence supporting CD’s theories. His work has shown him there are problems in separating species from varieties, and has also revealed many surprising instances of variation in habits.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
9 Oct 1871
Source of text:
DAR 171: 297
Summary:

Is preparing a work on fertilisation of flowers, and wants to add a list of works containing observations on cross-fertilisation of plants. Asks CD for any references he may have.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
5 May 1872
Source of text:
DAR 171: 298
Summary:

Thanks CD for MS on the routes of male bees.

His "Fertilisation of flowers" is complete [Die Befruchtung der Blumen (1873)].

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
28 Feb 1873
Source of text:
DAR 171: 299
Summary:

Sends his book [Die Befruchtung der Blumen (1873)]. Hopes CD will publish an opinion of it.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
12 May 1873
Source of text:
DAR 171: 300
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
19 May 1873
Source of text:
DAR 76: B181–2, DAR 77: 139
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.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
27 May 1873
Source of text:
DAR 171: 301
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
10 June 1873
Source of text:
DAR 77: 154–5
Summary:

Reports on insects fertilising Viola tricolor and on the fertilisation of the two wild forms [see Cross and self-fertilisation, p. 124 n., 125].

Contributor:
Darwin Correspondence Project
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From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
1 July 1873
Source of text:
DAR 76: B184
Summary:

Sends a note on R. Caspary’s observations of Corydalis self-fertilisation [see Cross and self-fertilisation, p. 331].

Has begun his experiments on the self- and cross-fertilised flowers.

Contributor:
Darwin Correspondence Project
thumbnail
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
25 Aug 1873
Source of text:
DAR 171: 302
Summary:

Fritz Müller is now working on the Brazilian honey-bees (Melipona and Trigona).

HM thanks CD for fertilisation references.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
15 Feb 1874
Source of text:
DAR 171: 303
Summary:

Feels CD’s and Fritz Müller’s judgments on his "Anwendung" essay [see 8313] are of highest value. Mentions some of FM’s comments.

Looks forward to second English edition of Descent.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
7 Aug 1875
Source of text:
DAR 171: 304
Summary:

Thanks for Insectivorous plants.

Believes Lepidoptera are of greater importance as fertilisers in alpine regions than in lowlands.

The famous stone pits of Ohningen are for sale.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
23 Oct 1875
Source of text:
DAR 171: 305
Summary:

Is glad CD is working on cross- and self-fertilisation; reports recent works of botanists, notably Thomas Meehan’s ["Are insects any material aid to plants in fertilisation?", Philadelphia Press 13 Aug 1875], in which the importance of cross-fertilisation is denied.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
16 Feb 1876
Source of text:
DAR 46.2: C61–2
Summary:

Observations on hive- and humble-bees. Perforating habits differ in different individuals of the same species.

Contributor:
Darwin Correspondence Project
thumbnail
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
4 Sept 1876
Source of text:
DAR 171: 306
Summary:

Bombus mastrucatus, an alpine bee, conforms to his observations that B. terrestris breaks open the flowers of Trifolium pratense. However, in the Alps, B. terrestris does not behave this way.

Gentiana species are adapted to lepidopteran cross-fertilisation.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
4 Oct 1876
Source of text:
DAR 171: 307
Summary:

He has never observed the straight line flight routes in male humble-bees that CD reports.

His last letter was in error: alpine Bombus terrestris does break into some flowers.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
6 Dec 1876
Source of text:
DAR 171: 308
Summary:

Thanks for Cross and self-fertilisation.

Fritz Müller has been appointed "Naturalista Viajante" of the Rio de Janeiro Museum, which will help his income greatly.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
28 Dec 1876
Source of text:
DAR 171: 309
Summary:

No papers on heterostyly have appeared since 1873.

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
25 Jan 1877
Source of text:
DAR 110: A26–7
Summary:

Thanks CD for calling attention to a "considerable error" in his observations on Hottonia fertility [in Die Befruchtung der Blumen (1873)]. [See Forms of flowers, p. 52.]

Contributor:
Darwin Correspondence Project
From:
Heinrich Ludwig Hermann (Hermann) Müller
To:
Charles Robert Darwin
Date:
2 Apr 1877
Source of text:
DAR 111: A88
Summary:

Is pleased that CD agrees with HM’s suggestions and criticisms of CD’s work. Will undertake experiments with Viola tricolor seeds to see if they produce both large- and small-flowered plants.

Contributor:
Darwin Correspondence Project