[12] It may become an important problem to the physiologist and physician to determine whether the same law does not hold good in respect to whatever is naturally injurious to the human constitution in any way, so long as its resisting power is not overbalanced. If all kinds of unhealthy conditions, surroundings, and exposures can be made to produce the good effects of healthful stimulation when made use of to the proper extent, however little that may be, while only past that limit they become destructive, then a change will come over a great many notions and practices. Some facts are reconciled by such a theory which are otherwise quite contradictory.

[13] Appleton’s Journal—department devoted to Science.

Transcriber’s Notes