The Romance of Modern Chemistry
Forfatter: James C. Phillip
År: 1912
Forlag: Seeley, Service & Co. Limited
Sted: London
Sider: 347
UDK: 540 Phi
A Description in non-technical Language of the diverse and wonderful ways in which chemical forces are at work and of their manifold application in modern life.
With 29 illustrations & 15 diagrams.
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
ACIDS AND ALKALIS
the surface. So also the lime in mortar gradually
absorbs carbon dioxide, becoming converted into the
hard carbonate of lime. It will, of course, take a very
long time for the hardening to be complete, but the
examination of ancient mortar from Greek and Roman
ruins has shown that in these cases the carbon dioxide
absorbed from the atmosphere has been sufficient to
convert all slaked lime into the carbonate. In fact,
by pouring a little acid on a piece of old mortar any
one can see that it contains a carbonate. Every stone
or brick wall, therefore, in which mortar has been used
must be pictured as the scene of a slow, imperceptible
chemical change—a change which will probably go on
as long as the wall lasts.
94