Hahneman is very particular as to the number of shakes to which medicines in solution should be subjected. On this point he says, “A long experience and multiplied observations upon the sick lead me within the last few years to prefer giving only two shakes to medicinal liquids, whereas I formerly used to give ten.” What particular effect this difference in the amount of shaking has upon the ‘dynamic power’ of the medicines, he does not see fit to say. I suppose he means that the more shakes a medicine receives, the greater is its power. If this be true, what a tremendous ‘dynamic power’ must be imparted to some of the liquid medicines in the saddle bags of country doctors, as they jog about from place to place; and yet, poor unobserving mortals, they never discern any of the effects of this power though they might be very apparent to the acute vision of Hahneman and his followers. The common idea on this subject is, that when any substance, as tartar emetic, for example, is _fully_ dissolved in water, no amount of shaking can effect a more intimate union between the tartar emetic and the water. Nor can it alter the nature of the union, so as to give the solution any new power, or any increase of power. In order to alter the nature of the union, you must introduce a third agent, which shall act _chemically_ upon the tartar emetic and the water. This is true so far as we know; and it was universally acknowledged to be true till Hahneman came out with an opposite opinion. But to establish what is so opposite to all past experience, and to overthrow what has been considered by all as an established fact, the very best of proof is necessary. Hahneman says, that the proof is to be found in the effects of the solutions, to which agitation has communicated the ‘dynamic power.’ And if the effects, which he asserts that he and other Homœopathists have seen, are really produced, then the proof I allow is competent.