Excerpt from Medico-Chirurgical Transactions, 1880, Vol. 63 N o invariable rule was here manifested, only it may be said that whilst for all degrees of fever the earlier non spirillar stage had a mean duration of near 60 hours, that of apyretic infection had a mean of divergencies as regards the intensity of ensuing pyrexia were more variable than the conditions of experiment, which was hardly to be anticipated, and I regard the absence of an appreciable regularity of sequence in this respect, an incubation-period of almost identical length preceding, in individual instances, both mild and severe attacks, as indicative of some intrinsic difference of the contagium which is not displayed until fever sets in. The following note bears upon this topic. 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.