WCP2939

[1]^{1, 2, 3}

7, Kensington Park Gardens.

London.W.

May 10th, 1909.

My dear Wallace,

I don't think Arrhenius's R. I. lectures will be published separately by the R. I. We never publish the afternoon lectures, leaving them for the authors to republish or rewrite them as they wish. In most cases they are expanded into book form. In Arrhenius's case I do not know what he will do. I will ask him tomorrow. I think they are only an abstract, with perhaps some addition of his "Worlds in the Making", which perhaps you have seen.

I know nothing of Gibson's "Scientific Ideas of Today", but from the review in Nature I think it is a sound work. Do you know Lodge's "Ether of Space"? It is most suggestive and interesting and I am sure you would like it.

I enclose an address I gave at Berlin some [2] years ago, which may be the one you refer to.

I will bear in mind your requirements, and if I come across any book I think you will like I will let you know the title.

I am sorry we saw so little of you when you came to the R. I. to lecture, but there was little time to spare either before or after, and one did not like to do anything that would have fatigued you after your magnificent effort.

Believe me, | very sincerely yours, | William Crookes [signature]