3 MARCH 1933, Page 18

COSMIC PHYSICS

[To the Editor of THE SPECTATOR.] SIR,—The final paragraph of Mr. J. D. Cockcroft's article, "New Light on the Atom," in the issue of The Spectator for February 24th may not unjustly be taken to express the latest addition to our knowledge of cosmic physics : " We have to add now to our list of projectiles these streams of cosmic particles, arising from some unknown source, uncontrollable in energy but most powerful of all in the violence of the transmuta- tion they produce."

It is perhaps not without interest, therefore, to place by the side of this passage Lucretius V, 366-369 :

" neque autom corpora desunt, Ex infinito quae possint forte coorta Corruere harm rerun violento turbine summara Aut aliam quamvis cladem inportare pericli."

Mill Hill School.