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Excerpt from Meteorological Statistics for 1907 Except in the case of the Hagerman Hall anemometer, the sources of supplementary data above named are quite different from the primary ones, either as respect construction or exposure of instruments, and hence discrepancies between the parallel records are continually presented. This in some cases is hardly to be regretted, Since a comparison may elicit additional information upon the actual physical conditions. In other cases, and particularly in that of the two sunshine recorders, the divergencies are much greater than could be desired, and occasionally, in fact, their simultaneous records would hardly be believed to belong to the same day. Each instrument gives a more or less defective account of the sun shine in the early morning hours. In the statistical tables of this Publication, in this, as in former years, no attempt is made to supply this omission, but the data are given as derived from the instrument. This fact accounts for an apparent disagreement with certain other compilations, drawn from the same original source, in which it is the customary practice to add to the instrumental record a correction determined empirically from month to month, by observing how much the record falls Short of 100 per cent. On one or more selected days observed to be cloudless. 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.
Weather forecasting is the most visible branch of meteorology and has its modern roots in the nineteenth century when scientists redefined meteorology in the way weather forecasts were made, developing maps of isobars, or lines of equal atmospheric pressure, as the main forecasting tool. This book is the history of how weather forecasting was moulded and modelled by the processes of nation-state building and statistics in the Western world.