Book Description

Excerpt from Encyclopaedia Britannica, or a Dictionary of Arts, Sciences, and Miscellaneous Literature, 1823, Vol. 14 The circulation of the blood may be easiest seen in the tails or fins of fishes, in the fine membranes be tween a frog's toes, or best of all in the tail of a water-newt. If object he a small fish, place it within the tube and spread its tail or fin along the side thereof if a frog, choose such a one as can but just be got into your tube; and, with a pen, or small stick, expand the transparent membrane between' the toes of the frog's hind foot as much as you can. When your object is so adjusted that no part of it can inter cept the light from the place you intend to view, nu screw the long screw CC, and thrust your tube into the arched cavity, quite through thy body of the mil oroscopo; then screw it to the true focal distance, and you will see the blood passing along its vessels with a rapid motion, and in a most eu rising manner. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.