WCP2993

[1]¹

55. GRANVILLE PARK,

LEWISHAM. LONDON. S. E.

Aug. 14. 10.

Dear Mr. Wallace,

I believe the number has been estimated at 100, 000. But the possibilities are infinite: we can turn out new compounds of the thousand, if required. Nowadays we limit the output to those of some special interest. Nature, however, is very conservative & [2] the possibilites are limited in comparison with these afforded by the laboratory; this is because vital chemistry is in large measure, a directed process.² I have dealt with this point to some extent in my address last year at the B. A. meeting, of which I venture to enclose a copy.

Yours truly | Henry E. Armstrong³ [signature]