(280/4.

"As it is we have made out clearly that with some plants (chiefly succulent) the bloom checks evaporation--with some certainly prevents attacks of insects; with some sea-shore plants prevents injury from salt-water, and I believe, with a few prevents injury from pure water resting on the leaves." (See letter to Sir W.
Thiselton-Dyer, "Life and Letters," III., page 341.

A paper on the same subject by Francis Darwin was published in the "Journ.

Linn.
Soc." XXII.)) If you have any decided opinion whether plants with conspicuously glaucous leaves are more frequent in hot than in temperate or cold, in dry than in damp countries, I should be grateful if you would add to your many kindnesses by informing me.

Pray give my kind remembrances to your son, and tell him that my son has been trying on a large scale the effects of feeding Drosera with meat, and the results are most striking and far more favourable than I anticipated.
LETTER 281.