E. Warren to K. Pearson, c.19th Jan. 1903.- External URL
- Correspondence Details
-
Sent From (Definite): Ernest WarrenSent To (Definite): Karl PearsonDate: 19 Jan 1903
- Current Holder(s)
-
Holder (Definite): University College London: Special Collections
- No links match your filters. Clear Filters
-
Sent fromErnest Warren
19 Jan 1903
Description:
‘Dear Prof. Pearson,
The thickness of the shell of snails varies very considerably and I have been wondering whether this might not be a character which could be readily measured in addition to the “radula” teeth.
There is a little instrument made by Zeiss for measuring the thickness of cover-glasses for microscopic slides, and I should think it could readily be used for little pieces of shell broken off say about half an inch above the growing edge of the snail-shell.
Undoubtedly the thickness of the shell depends to a large extent on the amount of mineral matter obtained by the animal, but the parents were procured from the same locality, and the families are living as nearly as possible under the same conditions.
Besides the snails there are several little matters I should like to talk over when you have a spare half-hour...’
-
Sent toKarl Pearson
19 Jan 1903
Description:
‘Dear Prof. Pearson,
The thickness of the shell of snails varies very considerably and I have been wondering whether this might not be a character which could be readily measured in addition to the “radula” teeth.
There is a little instrument made by Zeiss for measuring the thickness of cover-glasses for microscopic slides, and I should think it could readily be used for little pieces of shell broken off say about half an inch above the growing edge of the snail-shell.
Undoubtedly the thickness of the shell depends to a large extent on the amount of mineral matter obtained by the animal, but the parents were procured from the same locality, and the families are living as nearly as possible under the same conditions.
Besides the snails there are several little matters I should like to talk over when you have a spare half-hour...’
-
