Part

 1 Int|     are masterpieces of their kind. "The matter," says a biographer, "
 2 I  |     interest in that peculiar kind of mental labour, which
 3 I  |       sciences as regards the kind of scientific work. I then
 4 I  | interest of quite a different kind to that which mental and
 5 I  |    the natural sciences, this kind of interest is wanting.
 6 I  |   this labour; but there is a kind, I might almost say, of
 7 I  |     man is of the most varied kind as regards the force or
 8 I  |   motions used on it, and the kind of work produced. But both
 9 II |   decisive experiment of this kind was made by Sir Humphry
10 III|    with the best data of this kind give us the value of the
11 III|        We turn now to another kind of natural forces which
12 III|    sulphate of zinc, a saline kind of substance, dissolves
13 III|      transformed into another kind of activity. Even within