Excerpt from Journal of the Franklin Institute of the State of Pennsylvania and Mechanics' Register, Vol. 21: Devoted to Mechanical and Physical Science, Civil Engineering, the Arts and Manufactures, and the Recording of American and Other Patented InventionsSuch is the mode proposed by Mr. Vicat for making factitious puzzalona, and he teaches us nothing new, for he does not tell us what is the particu lar condition in which the silex and alumine should be found to afford good results. Opinions were for a long time divided on the question whether the clays, which it was desired to convert into good cements, should be heated much or little - these cements being, really, artificial puzzalonas.at Mr. Vicat has adopted the Opinion of those who thought they should be burned but little, but experiments which are to follow will Show that this (as a general principle) is erroneous - it being necessary to burn more or less, according to the composition of the clay. The problem, therefore, was not resolved by Mr. Vicat, though he says it was, and the experiments which follow will Show in what it really consists.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.