II. On the relation of form and dimensions to weight of material in the construction of iron-clad ships

this nitrile is converted into an acid which M. Merz describes under the name of naphthaline-carboxylic acid. The opinion expressed by this chemist, that his acid might be identical with the one observed by myself, I am inclined to adopt, although there are still some few discrepancies in our observations to be elucidated. M. Merz states that the fusing-point of his acid is at 140°, whilst the acid examined by myself fuses at 160°. In order to remove, if possible, this discrepancy, I have, since I saw M. Merz’s paper, again and repeatedly taken the fusing-point of menaphthoxylic acid, but always with the same result. Possibly the fusingpoint of the acid prepared by means of a sulphonaphthylate may be found somewhat higher when the compound is carefully purified by repeated crystallization from alcohol. 306 Mr. Reed on the Form, Dimensions, [Mar. 19}