IN a few vacation days in August, 1877, an article was written which appeared in Harper's Magazine for May, 1878, entitled Free Muscular Development. The Boston Journal of Cliemie ory urged the Messrs. Harper to reprint it in their Half-hour Series. The latter thereupon ex pressed a wish that the subject therein considered might be gone into more extensively; and as their scrap-hooks showed that the article had been widely and favorably received by the press, there seemed fair reason to hope that a little broader and fuller view of the same topic might share that favor.