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From W. K. Bridgman 23 January 1869
Summary
Is assembling apparatus of lenses and reflector to observe flower from opening to first shedding of pollen, and to determine whether fertilisation is by night- or day-feeders.
Will also examine reasons for absence of nectar in Polygala linaria.
| Author: | William Kencely Bridgman |
| Addressee: | Charles Robert Darwin |
| Date: | 23 Jan 1869 |
| Classmark: | DAR 160: 307 |
| Letter no: | DCP-LETT-6571 |
