From Lawson Tait 12 June [1875]1
7, Great Charles St. | Birmingham.
June 12
My Dear Sir,
Another point that may interest you.
The glands of Drosera dichotoma (australian) are constantly covered with the viscid secretion, its action being exactly that of the D. rotundifolia.2
I gathered a lot of the fluid and by Brücke’s method I have been able to separate a nitrogenous matter with a very close resemblance to pepsine.3
It is not pepsine, but I propose meantime to call it droserin. If you would like the details of my experiments & the process I shall be glad to send them. It has a curious action on milk, amongst other things, resembling but not identical with rennet. I suppose you know that old Gerrards says that D. rot. was very much used in Cheshire in his days for rennet.4
I have just had a summons & am just off to Shrewsbury
Yours, faithfully, | Lawson Tait
Please don’t trouble to write an answer to this more than a post card to say if you would like the particulars.
Footnotes
Bibliography
Brücke, Ernst Wilhelm. 1861. Beiträge zur Lehre von der Verdauung. Sitzungsberichte der Akademie der Wissenschaften in Wien. Mathematisch-naturwissenschaftliche Klasse 43 (2d part): 601–23.
Gerard, John. 1597. The Herball, or, Generall historie of plantes. London: John Norton.
Summary
Has separated out a pepsin-like substance from the secretion of Drosera, which he proposes to call "Droserin".
Letter details
- Letter no.
- DCP-LETT-10015
- From
- Robert Lawson (Lawson) Tait
- To
- Charles Robert Darwin
- Sent from
- Birmingham
- Source of text
- DAR 178: 9
- Physical description
- ALS 4pp
Please cite as
Darwin Correspondence Project, “Letter no. 10015,” accessed on 19 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-10015.xml
Also published in The Correspondence of Charles Darwin, vol. 23