. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1S40.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 197 ON THE CONSTRUCTION OF OBLIQUE ARCHES. Sir—In your iiuinber for April, p. ll(i, I observe some observations upon my work on Oblique Bridges, made by ;in anonymous writer under the sicruLUure B. H. B., to whicli I feel disposed to make a reply, requestincr t~lie favour of a place for it in your valuable periodical. In the first place I wish to premise that I tliink no author is under the necessity of replying to the critic
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1S40.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 197 ON THE CONSTRUCTION OF OBLIQUE ARCHES. Sir—In your iiuinber for April, p. ll(i, I observe some observations upon my work on Oblique Bridges, made by ;in anonymous writer under the sicruLUure B. H. B., to whicli I feel disposed to make a reply, requestincr t~lie favour of a place for it in your valuable periodical. In the first place I wish to premise that I tliink no author is under the necessity of replying to the criticisms of an anonymo\is writer, and that it would be more courteous if the writer of a paper professing to be of a scientific character were to put it forth with his name. B. H. B. in alluding to myself says as follows: " he observes the lines of the courses of the intrados should be made perpendicular to a line drawn between the extremities of the face of the arch, without ever giving any reason for it, or making any remark on the subject farther than that it should be ; It is f|uite true that I did not assign a reason for this construction ; because it is obviously in order that all the courses may be as nearly as possible at right angles to both faces of the arch, and at the same time parallel to each other. The greatest variation from the rectan- gular intersection is at the middle of the development, or at the crown of the arch: and at this point wdiere the course is nearly horizontal the variation is of no practical iraportanct or objection: and it may be shewn that it differs from a right angle by an angle whose tangent r= (-:-) cot e. The two methods suggested, proposed, or recommended by B. H. B. to be substituted for the above, are most extraordinary. His second method which he prefers, may be described as a recommendation to build an oblique bridge by commencing ivith horizontal courses, and "summering" them (in workman's pln-aseology) as the w
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