To Edward Cresy 29 April 1
Down, Farnborough, Kent,
My dear Sir,
I am uncommonly much obliged to you for your note which has been of the greatest use to me. From what you say, I will try the siphon plan, with 1 inch pipe, which was just what I wanted to know. What you say about a good pump being required to fill the siphon, has made me think of my hydropathic Douche Pump (not now used)2 which is a three inch lift pump and stands just in the right place. I will try a union joint (as you suggest) but at only one end, and will, when filled, plug it up, lower it in the tank to be filled, and then by a string and stick pull out the plug.
I am also very grateful for suggestion about the 9 inch ribs of Brickwork which shall be done. In your section, I see that the extra and upper half-brick work does not bond with the lower half-brick, and I suppose this is intentional, for Mr. Lastell3 told me before, that in strengthening a dome all over, the upper course was only cemented on the lower, not bonded into it. If I understand your section wrong, perhaps you will send me a line: if I do not hear, I shall understand that I am right.
The only point on which I am doubtful is the kind of hose: it will be seldom used, and I will call on Burgess & Key4 and see what they say about their canvas hose coated & lined for the douche, and used for watering gardens with pure water or liquid manure. This is only 9d per foot, 1 inch bore. I shd. grudge much more expense for my plan.
I hope sometime in the course of the summer (part of which however we shall be away)5 to persuade you to pay me a visit for a day or two.
With very many thanks for your valuable advice, | Sincerely yours, | C. Darwin.
At the same time I wrote to you I sent the same question to the Gardeners’ Chronicle6 but it now turns out through your kindness quite superfluously.
Discusses installation of watering system. Sent question to Gardeners’ Chronicle but, through EC’s kindness, superfluously.
Please cite as
Darwin Correspondence Project, “Letter no. 1677,” accessed on 22 January 2017, http://www.darwinproject.ac.uk/DCP-LETT-1677