"You certainly do put the study in a new and most pleasurable light," replied Alexander.
"The more you search into nature, the more wonderful do you find her secrets, and, by the aid of chemistry, we are continually making new discoveries. Observe, Mr. Wilmot," said Swinton, picking up a straw which had been blown by the wind on the quarter-deck, "do you consider that there is any analogy between this straw and the flint in the lock of that gun?"
"Certainly, I should imagine them as opposite particles of nature as well might be."
"Such is not the case. This piece of wheat-straw contains more than sixty per cent. of silica or flint in its composition; so that, although a vegetable, it is nearly two-thirds composed of the hardest mineral substance we know of. You would scarcely believe that the fibers of the root of this plant were capable of dissolving, feeding upon, and digesting such a hard substance; but so it is."
"It is very wonderful."
"It is, but it is not a solitary instance; the phosphate of lime, which is the chief component part of the bones of animals, is equally sought by plants, dissolved in the same manner, and taken into their bodies; barley and oats have about thirty per cent. of it in their composition, and most woods and plants have more or less."
"I am less surprised at that than I am with the flint, which appears almost incomprehensible."
"Nothing is impossible with God; there is a rush in Holland which contains much more silex than the wheat-straw, and it is employed by the Dutch to polish wood and brass, on that very account. We know but little yet, but we do know that mineral substances are found in the composition of most living animals, if not all; indeed, the coloring-matter of the blood is an oxide and phosphate of iron."
"I can now understand why you are so enthusiastic in the science, Mr. Swinton, and I regret much that the short time which will be occupied in the remainder of our voyage will not enable me to profit as I should wish by your conversation; for when we arrive at the Cape, I fear our pursuits will lead us different ways."
"I presume they will, for I am about to penetrate as far as possible into the interior of the country," replied Mr. Swinton, "which of course is not your intention."