Thus far, then, though we arrive at nothing positive, we yet find our suspicions of a poisonous influence emanating from the putrid reptiles remaining. Indeed, it were impossible wholly to suppress them, and I will ask the candid reader's attention for a few moments to certain analogical evidence in the case, which, it is believed, will greatly aid the mind in coming to a right decision on the subject. An eruptive disease broke out in two families residing in a house in Eastern Massachusetts, a few years ago, which was observed to affect more or less, every member of the two families who had drunk water from the common family well, except two; and these last had drank but very little. On cleaning the well, the same species of reptiles which I have already mentioned, were found in it, in a state of decomposition, and highly offensive. No eruptive complaints of the same general kind prevailed at the time in the neighborhood, and those which I have mentioned disappeared soon after resuming the use of pure water. Another instance occurred in this same region, a few years afterward. In the latter case, however, the putrid animals were rats and mice, and the eruption, instead of having a diffused or miliary appearance, partook largely of the character of the common boil. Forty years ago a sickness broke out in Litchfield county in Connecticut, in a neighborhood where the wells were all very low; and the water which remained being in a cavity of rock, and continuing unchanged or nearly so, had at length become putrid. It was late in the autumn when the disease broke out, and it disappeared as soon as the wells were duly filled for the winter. It is true, I never heard in the latter case, any thing about putrid animals, but their existence and presence under such circumstances, would be natural enough. It has, I know, been sometimes said that putrid animal substances, however unpleasant their odor might be, were not poisonous. But this opinion is doubtless unfounded; and, for myself, I find it difficult to resist the belief that in all the foregoing cases, except the last, and very possibly in that too, animal putridity had influence. The practical lessons to be derived from the developments of the foregoing chapter are exceedingly numerous. I shall direct your attention for a few moments, to some of the more important. First, we learn the necessity of keeping our wells in a proper condition. Could it be even proved that dead reptiles never produce disease, it is at least highly desirable to avoid them. No reasonable person would be willing to drink water highly impregnated with their odor, even if it did not reach his own seat of sensation.