And the _Quebec Mercury_ of the 10th July, 1878, has the following in relation to a second letter from the same source: “It will be remembered that in February, 1877, Mr. Baillairgé received an official letter from the Minister of Public Instruction, of St. Petersburg, Russia, informing him that his new system of mensuration had been adopted in all the primary and medium schools of that vast empire. After a lapse of eighteen months, the system having been found to work well, Mr. Baillairgé has received an additional testimonial from the same source, informing him that the system is to be applied in all the polytechnic schools of the Russian empire.” Mr. Baillairgé has since that time given occasional lectures in both languages on industrial art and design, and on other interesting and instructive topics, and is now engaged on a dictionary or dictionaries of the consonances of both the French and English languages. In 1866 he wrote his treatise on geometry and trigonometry, plane and spherical, with mathematical tables—a volume of some 900 pages octavo, and has since edited several works and pamphlets on like subjects. In his work on geometry, which, by the way, is written in the French language, Mr. Baillairgé has, by a process explained in the preface, reduced to fully half their number the two hundred and odd propositions of the first six books of Euclid, while deducing and retaining all the conclusions arrived at by the great geometer. Mr. Baillairgé, moreover, shows the practical use and adaptation of problems and theorems which might otherwise appear to be of doubtful utility, as of the ratio between the tangent, whole secant, and part of the secant without the circle, in the laying out of railroad and other curves running through given points, and numerous other examples. His treatment of spherics and of the affections of the sides and angles is, in many respects, novel, and more easy of apprehension by the general student. In a note at foot of page 330, Mr. Baillairgé shows the fallacy of Thorpe’s pretended solution of the trisection of an angle, at which the poor man had laboured for thirty-four years, and takes the then government to task for granting Mr. Thorpe a patent for the discovery. In February, 1874, he visited Europe, and it was on the 15th of March of that year that he received his first laurels at the “Grand Conservatoire National des Arts et Métiers,” Paris. Some of Mr. Baillairgé’s annual reports on civic affairs are very interesting and instructive; that of 1878, on “The Municipal Situation,” is particularly worthy of perusal. His report of 1872 was more especially sought after by almost every city engineer in Canada and the United States, on account of the varied information it conveyed. It may also be remembered, as illustrative of the versatility of his talent and of his humouristic turn of mind, that a comedy, “Le Diable Devenu Cuisinier,” written by him in the French