Excerpt from Tables, Distribution, and Variations of the Atmospheric Temperature of the United States, and Some Adjacent Parts of America: Collected by the Smithsonian Institution Respecting the corrections necessary to refer monthly and annual means depend ing on observations at certain hours to what they would have been had the observa tions been made hourly and continued day and night, the reader is referred to the discussion of the daily variation of the temperature. In this discussion it is shown that the mean of hourly observations represents the average temperature of the day within about Fah. The following table of' corrections for daily variation to means resulting from observations at certain hours was prepared directly from observations extending over a series of years at Toronto, Mohawk, New Haven, and Philadelphia; it is inserted here on account of its frequent application to our tabular results, either to refer them to the mean of the day or to a uniform set of hours, in which latter case the table can be made readily to apply. This table of corrections was found to answer well enough for the Eastern and Western States lying within the range of latitudes of the four stations; for Southern States and for the elevated western portion of the United States other less reliable corrections had to be supplied. 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.