This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...Measurements of temperature by means of the mercury thermometer are subject to so many sources of error that an accurate determination of temperature is a task of some difficulty. Nevertheless, thermometric methods have become so highly developed that by taking proper precautions and making proper corrections, a ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...Measurements of temperature by means of the mercury thermometer are subject to so many sources of error that an accurate determination of temperature is a task of some difficulty. Nevertheless, thermometric methods have become so highly developed that by taking proper precautions and making proper corrections, a measurement of temperature between o--io0 C. can be made with an accuracy of 0.005 '. The methods described in the following pages correspond to an accuracy of about 0.05. The principal sources of error inherent in a mercury in glass thermometer aret 1. Errors due to the changes in the volume of the bulb lagging behind the changes in temperature. A rising thermometer indicates too low, and a falling thermometer too high a temperature. This lag is due to the viscosity of the glass of which the thermometer is made. If a thermometer be kept at a uniform temperature, of say 20 C, for some days, and be then plunged into a bath of melting ice, and the temperature observed; and if it be then heated to a temperature of 100 C, or more, and plunged into the bath of melting ice, the temperature now observed will be lower than the one previously obtained. In such a case, the zero point may be depressed as much as half a degree for some kinds of glass. The depression of the zero point is greater as the temperature is increased, or the time is increased that the thermometer is kept at the higher temperature. The depression of the zero point persists for weeks and even months before the normal volume of the thermometer at its present temperature is attained. While a thermometer is being used at various temperatures, the zero point is therefore constantly changing. This makes no temperature determinate unless the value of the zero point at this particular time is k...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
