§ 284 Fifth Edition
The action of a dose, moreover, dose not diminish in the direct ratio of the quantity of material medicine contained in the dilutions used in homoeopathic practice. Eight drops of the tincture of a medicine to the dose do not produce four times as much effect on the human body as two drops, but only about twice the effect that is produced by two drops to the dose. In like manner, one drop of a mixture of a drop of the tincture with ten drops of some unmedicinal fluid, when taken, will not produce ten times more effect than one drop of mixture ten times more attenuated, but only about (scarcely) twice as strong an effect, and so on, in the same ratio – so that a drop of the lowest dilution must, and really does, display still a very considerable action.1
1 Supposing one drop of a mixture that contains 1/10 of a grain of medicine produces an effect = a; one drop of a more diluted mixture containing 1/100th of a grain of the medicine will only produce an effect = a/2; if it contain 1/10000th of a grain of medicine, about = a/4; if it contain 1/100000000th of a grain of medicine it will produce and effect = a/8; and thus it goes on, the volume of the doses being equal, with every (perhaps more than) quadratic diminution of the quantity of medicine, the action on the human body will be diminished each time to only about one-half. I have very often seen a drop of the decillion-fold dilution of tincture of nux vomica produce pretty nearly just half as much effect as a drop of the quintillion-fold dilution, under the same circumstances and in the same individual.
§ 284 Sixth Edition
Besides the tongue, mouth and stomach, which are most commonly affected by the administration of medicine, the nose and respiratory organs are receptive of the action of medicines in fluid form by means of olfaction and inhalation through the mouth. But the whole remaining skin of the body clothed with epidermis, is adapted to the action of medicinal solutions, especially if the inunction is connected with simultaneous internal administration.1
1 The power of medicines acting upon the infant through the milk of the mother or wet nurse is wonderfully helpful. Every disease in a child yields to the rightly chosen homoeopathic medicines given in moderate doses to the nursing mother and so administered, is more easily and certainly utilized by these new world-citizens than is possible in later years. Since most infants usually have imparted to them psora through the milk of the nurse, if they do not already possess it through heredity from the mother, they may be at the same time protected antipsorically by means of the milk of the nurse rendered medicinally in this manner. But the case of mothers in their (first) pregnancy by means of a mild antipsoric treatment, especially with sulphur dynamizations prepared according to the directions in this edition (§ 270), is indispensable in order to destroy the psora – that producer of most chronic diseases – which is given them hereditarily; destroy it both within themselves and in the foetus, thereby protecting posterity in advance. This is true of pregnant women thus treated; they have given birth to children usually more healthy and stronger, to the astonishment of everybody. A new confirmation of the great truth of the psora theory discovered by me.