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<p>Accurate determinations of the heat of combustion of a solid may be made by means of a calorimetric bomb of one of the several recognised types. In order to make it possible for different laboratories to express results of calorimetric determinations on a uniform and comparable basis, it was deemed desirable to determine accurately the heats of combustion of some chosen substances which can be reproduced with the requisite degree of purity, and which can be used for calibrating the various forms of bomb calorimeters in use in commercial laboratories, as well as by scientific investigators. This made necessary a careful study of the methods which%
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<br>Subjects: measurements and use of instruments/ B0500 Materials science for electrical and electronic engineering</div>
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