OBSERVATORY,
CAMBRIDGE.
26. May 1903
My dear Dr Wallace,
I am so sorry your lecture should have remained so long unanswered.
I have not published anything on the subject to which you refer, but I have no doubt that what your friend alluded to was a repeat of my lectures [2] at the Royal Institution in which I mentioned a few facts such as the following
1st that the great nebula in Orion (owing to its large extent) must receive daily about 200,000 times as much sun heat as the Earth receives in the same time[.]
2nd that it is infinitely unlikely that any appreciable portion of the sun heat can [3] escape into infinite space it is all stopped by matter.
But since I have seen "radium" I must say my notions as to the problems concerning sun heat have become quite unsettled.
I was so glad to hear from you & to read your very interesting paper[.]1
Yours truly | Robert S Ball2 [signature]
Status: Draft transcription [Letter (WCP2827.2717)]
For more information about the transcriptions and metadata, see https://wallaceletters.myspecies.info/content/epsilon
Please cite as “WCP2827,” in Beccaloni, G. W. (ed.), Ɛpsilon: The Alfred Russel Wallace Collection accessed on