A BOYISH PROPENSITY. 127 of it, during fifty years sparing neither pains nor expense in procuring materials for a collection which in course of time became very valuable— “his house being full of animals, insects especially, vegetables and fossils, though without the least confusion, everything being disposed in its proper place and order. Both citizens and strangers (con- tinues Boerhaave) viewed this collection with great admiration; and the greatest princes that passed through Amsterdam visited it, as one of the things best worth their attention in that famous city.” The young Swammerdam was intended for the Church, but, having no disposition for that calling, induced his father to consent that he should be brought up to the medical profession, and he re- mained at home during his preparatory studies, where he was frequently employed in cleaning, arranging, and cataloguing the curiosities and treasures we have spoken of. In this manner he gradually acquired a deep-rooted love for the study of natural history ; and very soon he began to make a collection of his own, procuring specimens of various kinds, ‘‘ catching some, buying or bartering for others, and disposing them in certain classes, and comparing them with the accounts given by the best writers.” This boyish propensity “ grew with his growth,” and though, in obedience to the calls of duty, he attended to hig anatomical and