E. Warrent to K. Pearson, 8th July [1902?].- External URL
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Sent From (Definite): Ernest WarrenSent To (Definite): Karl PearsonDate: 8 Jul 1902
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Holder (Definite): University College London: Special Collections
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Sent fromErnest Warren
8 Jul 1902
Description:
‘Dear Prof. Pearson,
I have now counted 472 daisies (Bellis perennis (L.)) and I propose to count another series from the same patch of grass in the autumn. The modes at 34 and 42 are still more pronounced. The frequencies are:
[list of figs.]
I would be very interesting to compare this series with material gathered from various localities.
With regard to H. [sic –prob. Cepaea] hortensis, I do not know whether you have gone into the colour markings at all; but from the sample you gave me the colour variation seems to me to be very remarkable.
The shell is either lemon yellow or pale brown with no obvious bands or the shell has a whitish ground with 5 distinct dark brown bands.
[diag of each of these, w. ennumeration of pop. distribution]
Thus the shells are sharply divided into two quite distinct groups “I” and “II”; and out of 146 mds[?] I never had any doubt as to how to place any given individual.
There appears to be no transitional stages between the two groups and the case seems comparable to eye-colour etc.
If you have an opportunity to observe another population it would be most interesting to compare with the Gloucestershire series. Perhaps, however, the matter has already received your attention.
My H. aspersa[?] families are getting on very well.
Yours most faithfully,
E. Warren.'
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Sent toKarl Pearson
8 Jul 1902
Description:
‘Dear Prof. Pearson,
I have now counted 472 daisies (Bellis perennis (L.)) and I propose to count another series from the same patch of grass in the autumn. The modes at 34 and 42 are still more pronounced. The frequencies are:
[list of figs.]
I would be very interesting to compare this series with material gathered from various localities.
With regard to H. [sic –prob. Cepaea] hortensis, I do not know whether you have gone into the colour markings at all; but from the sample you gave me the colour variation seems to me to be very remarkable.
The shell is either lemon yellow or pale brown with no obvious bands or the shell has a whitish ground with 5 distinct dark brown bands.
[diag of each of these, w. ennumeration of pop. distribution]
Thus the shells are sharply divided into two quite distinct groups “I” and “II”; and out of 146 mds[?] I never had any doubt as to how to place any given individual.
There appears to be no transitional stages between the two groups and the case seems comparable to eye-colour etc.
If you have an opportunity to observe another population it would be most interesting to compare with the Gloucestershire series. Perhaps, however, the matter has already received your attention.
My H. aspersa[?] families are getting on very well.
Yours most faithfully,
E. Warren.'
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