Excerpt from The Philosophical Magazine, Vol. 38: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Geology, Agriculture, Manufactures and Commerce The general result of the experiments made upon a very meat number of bodies exposed to the light of the sun, leads the author to deterni: iie that those which are demi conductors of the electric fluid are all susceptible of taking fire by these means; that isolation bodies do not shine equally, some of them doing so teeblv or with and the rest not at all; lastly, that bodies which are con ductors remain dull: and this happens to the metals,t charcoal, to carburet of iron, to all the sulphurets and me tallic oxides, with the exception of orpiment, the semi vitreous oxides of arsenic and tin, and those of zinc and lead made in the humid way. Among the metallic salts, the author has only found that the mutiate of tin, the sul phate and the phosphate of lead, shine after being exposed to the sun. 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.