WBT progressing with breeding experiments for CD.
CD making quicker progress with Variation.
WBT progressing with breeding experiments for CD.
CD making quicker progress with Variation.
Discusses rudimentary sixth toe of frogs.
No summary available.
Introduces Signore Capellini, professor of geology at Bologna, to JH in letter. Asks JH to assist him in any way possible.
On CD’s request to observe bee Ophrys: PHG’s son collected 16 plants – of the 32 flowers, two had lost both pollinia, two had lost one each. He himself found two plants with pollinia adhering to the stigma.
No summary available.
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Requests tendril-bearing plants.
Comments on zero and observational errors when using a telescope, and adds some comments about family relationships and JH's nebula catalogue. [Part of this letter is indecipherable.]
Regarding translations of Walter Mapes regarding the origin of the word theodolite.
No summary available.
Sending back number of their 'Annals' to complete JH's set. Remarks on the parts already published.
No summary available.
No summary available.
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He and L. C. Treviranus have repeated many of CD’s orchid observations with the same results. Sends his paper ["Fruchtbildung der Orchideen", Bot. Ztg. 21 (1863): 329–33, 337–45].