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The author traces the history of aneroid barometers, barographs, storm glasses and weather houses with the help of 130 illustrations.

This sound level meter meets IEC Type 2 requirements and offers high accuracy for critical measurements. The R8060 features over/under range indicators for each of the 3 measurement ranges, a digital analog barograph and the ability to keep track of Min/Max readings. Low battery indicator and auto shut off.

The REED R5005 True RMS Industrial Multimeter is an full featured DMM capable of data logging and measuring multiple AC/DC signals simultaneously. With a large LCD screen, analog barograph and Bluetooth capability the R5005 measures AC/DC voltage and current, resistance, capacitance, frequency and temperature. Cat. IV 600-Volt, Cat. III 1000-Volt safety rating.

Everyone is familiar with the daily changes of air temperature. The barometer shows that these are accompanied by daily changes of mass distribution of the atmosphere, and consequently with daily motions of the air. In the tropics the daily pressure change is evident on the barographs; in temperate and higher latitudes it is not noticeable, being overwhelmed by cyclonic and anticyclonic pressure variations. There too, however, the daily change can be found by averaging the variations over many days; and the same process suffices to show that there is a still smaller lunar tide in the atmosphere, first sought by Laplace. Throughout nearly two centuries these 'tides', thermal and gravitational, have been extensively discussed in the periodical literature of science, although they are very minor phenomena at ground level. This monograph summarizes our present knowledge and theoretical under­ standing of them. It is more than twenty years since the appearance of the one previous monograph on them - by Wilkes - and nearly a decade since they were last comprehensively reviewed, by Siebert. The intervening years have seen many additions to our know­ ledge of the state of the upper atmosphere, and of the tides there, on the basis of measurements by radio, rockets and satellites.

Everyone is familiar with the daily changes of air temperature. The barometer shows that these are accompanied by daily changes of mass distribution of the atmosphere, and consequently with daily motions of the air. In the tropics the daily pressure change is evident on the barographs; in temperate and higher latitudes it is not noticeable, being overwhelmed by cyclonic and anticyclonic pressure variations. There too, however, the daily change can be found by averaging the variations over many days; and the same process suffices to show that there is a still smaller lunar tide in the atmosphere, first sought by Laplace. Throughout nearly two centuries these 'tides', thermal and gravitational, have been extensively discussed in the periodical literature of science, although they are very minor phenomena at ground level. This monograph summarizes our present knowledge and theoretical under­ standing of them. It is more than twenty years since the appearance of the one previous monograph on them - by Wilkes - and nearly a decade since they were last comprehensively reviewed, by Siebert. The intervening years have seen many additions to our know­ ledge of the state of the upper atmosphere, and of the tides there, on the basis of measurements by radio, rockets and satellites.

The author describes in detail how to restore wheel, stick and aneroid barometers and barographs from first dismantling the instrument, through the cleaning and repair of parts, refilling the mercury tube, case repair and refinishing, to final reassembly. Separate chapters deal with the special problems that can arise with stick or cistern tube barometers, aneroid barometers and barographs.