In order to see whether the heat came out of the chips he compared the capacity for heat of the chips abraded by the boring bar with that of an equal quantity of the metal cut from the block by a fine saw, and obtained the same result in the two cases, from which he concluded that "the heat produced could not possibly have been furnished at the expense of the latent heat of the metallic chips."
By this means the mean temperature of the brass was raised through about 70° Fahr., while the amount of metal abraded was only 837 grains.
They are not, however, to be used in the disinfection of instruments, nor where any large abraded surface would favour absorption.
Trunk or abraded mountains.
(a) Abrasionsplatten - Abraded plateaux.
A closer investigation of the numerous long, narrow banks which lie off the Flemish coast and the Thames estuary shows that they are composed of fragments of rock abraded and transported by tidal currents and storms in the same way that the chalk and limestone worn off from the eastern continuation of the island of Heligoland during the last two centuries has been reduced to the coarse gravel of the off-lying Dune.