XIV LE TABLEAU STÉRÉOMÉTRIQCE

No. 13567. Subj. 995. Réf. 20814.

Department of Public WorTcs,

Ottawa, Feby. 7th 1872.

Sir, — I am directed by the Minister to request you to furnish ilic Department with one of your " Tableau Stéréomêtrique."

dis. Baillairgé, Esq., F. Bravx.

Architect, etc., Québec. Secretary.

New Havf.x, Feb. 7tb 1872.

Chs. Baillairgé, Esq.

Dear Sir, — I bave been mucb interested in looking over tbe papers descriptive of your useful, valuable and (as it very plainly appears) universal application of a rule for the mensuration of solids. I sincerely congratula te you on tbe success which your discovery bas met with in ail quarters in which it bas at prisent been introduced. It must hâve been a great labour to work it ont to its présent state of perfection and you hâve the satisfaction of knowing tbat you are a benefactor aud stauncb pilot in that sea of difficulty, Geometry.

Y ours very sincerely, E. B. Barbeu.

High School, Québec, 8th Feb. 1872.

The rule is précise and simple, and being applicable to almost any vai'iety of solid, will greatly sborten the processes of calculation. I bave proved its accuracy as applied to several bodies.

The Tableau comprising a great variety of elementary models will serve admirably to educate the eye and must greatly facilitate the study of solid mensuration.

The Government would confer a boon on sbooTs of the middle and higher class by affording access to so suggestive a collection.

D. Wilkie, Eector.

Extrait d'un JEditorial de la "Québec Gazette" du 22 Mai J872,

sur la lecture de Mr. Baillairgé devant la société

Littéraire et Historique de Québec.

The lecturer exhibited bis Stereometrical Tableau, which is now* attracting so mucb attention in this as well as other countries, and demonstrated, to the perfect satisfaction of his hearers, that il was fully entitled to ail the.advantages claimed for it. At the close of tbe reading, Capt. Ashe, R. N., in proposing a vote of thanks fco the lecturer, whilst clainiiug for Dr. Simpson the discovery of the prismoidal formula, as known to apply to certain bodies (a tact alluded to in. the lecture), nevertheless highly complimented Mr. Baillairgé, for his gênerai application of the formula to ail known sobds.