18 OCTOBER 1879, Page 15

EUCLID AND I S MODERN RIVALS.

LTO THE EDITOp. Op THE "SPECTATOR.")

Silt, —Will you kindly allow me to point out a misprint in your review, October 11th, of the above-named book P In your extract from it, you make Euclid say, " There are two defects allowed to exist iu my Manual The first concerns my arrangement of Problems and Theorems ; the second, my treatment of Parallels." The word " allowed " should be "alleged." The difference looks trivial, but it is of vital importance, considering that so far from " allowing " Euclid's treatment of Parallels to be a defect, I have devoted the greater part of the book to a defence of that treatment, in opposition to those who " allege " it to be a defect.—I am, Sir, &c.,