Gold and silver are no doubt subject to fluctuations, from the discovery of new and more abundant mines; but such discoveries are rare, and their effects, though powerful, are limited to periods of comparatively short duration.
由于发现了储量更丰富的新矿藏，黄金和白银无疑会受到波动的影响;但这样的发现很少见，而且它们的影响虽然强大，但仅限于相对较短的时期。