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M. De Luc, F. R. S. in a large and valuable Treatise upon the Barometer and Thermometer, lately published at Geneva, the result of many years labour and study, has given a rule for the measurement of heights by the barometer, deduced from his experiments, and far more accurate than any published before; since it appears that he could determine heights by it generally to 10 or 15 feet, and that the error seldom, if ever, amounted to double that quantity.

philosophical transactions of the royal society of london

XX. M. De Luc's rule for measuring heights by the barometer, reduced to the English measure of length, and adapted to Fahrenheit's thermometer, and other scales of heat, and reduced to a more convenient expression