{133} This plan was brought before the notice of the British a.s.sociation for the advancement of Science in the year 1840.
{155} Harvey"s Meteorology, in the Encyclopaedia Metropolitana.
{181} One of the stones which fell at L"Aigle, on being a.n.a.lysed by Thenard, gave-
Silica 46 per cent.
Magnesia 10 Iron 45 Nickel 2 Sulphur 5
{210} See Frontispiece to this Chapter, p. 190.