III.  Or the new disease, after having long acted on the organism, at length joins the old one that is dissimilar to it, and forms with it a complex disease, so that each of them occupies a particular locality in the organism, namely, the organs peculiarly adapted for it, and, as it were, only the place specially belonging to it, while it leaves the rest to the other disease that is dissimilar to it. Thus a syphilitic patient may become psoric, and vice versa. As two disease dissimilar to each other, they cannot remove, cannot cure one another. At first the venereal symptoms are kept in abeyance and suspended when the psoric eruption begins to appear; in course of time, however (as the syphilis is at least as strong as the psora), the two join together,¹ that is, each involves those parts of the organism only which are most adapted for it, and the patient is thereby rendered more diseased and more difficult to cure.

When two dissimilar acute infectious diseases meet, as, for example, smallpox and measles, the one usually suspends the other, as has been before observed; yet there have also been severe epidemics of this kind, where, in rare cases, two dissimilar acute diseases occurred simultaneously in one and the same body, and for a short time combined, as it were, with each other. During an epidemic, in which smallpox and measles were prevalent at the same time, among three hundred cases (in which these diseases avoided or suspended one another, and measles attacked patients twenty days after the smallpox broke out, the smallpox, however, from seventeen to eighteen days after the appearance of the measles, so that the first disease had previously completed its regular course) there was yet one single case in which P. Russell ² met with both these dissimilar diseases in one person at the same time. Rainey³ witnessed the simultaneous occurrence of smallpox and measles in two girls. J. Maurice⁴, in his whole practice, only observed two such cases. Similar cases are to be found in Ettmuller’s ⁵ works, and in the writings of a few others.

Zencker⁶ saw cow-pox run its regular course along with measles and along with purpura.

¹ From careful experiments and cures of complex diseases of this kind, I am now firmly convinced that no real amalgamation of the two takes place, but that in such cases the one exists in the organism besides the other only, each in pairs that are adapted for it, and their cure will be completely effected by a judicious alternation of the best mercurial preparation, with the remedies specific for the psora, each given in the most suitable dose and form.
² Vide Transactions of a Society for the Improvement of Med. and Chir. Knowledge, ii.
³ In Edinb. Med and Phys. Journ., 1805.
⁴ In Med. and Phys. Journ., 1805.
⁵ Opera, ii, p.i, cap. 10.
⁶ In Hufeland’s Journal, xvii.

commentary:

We have already discussed two suggestion now we are on to the 3rd suggestion. THE NEW DISEASE AFTER HAVING LONG ACTED ON THE ORGANISM, AT LENGTH JOINS THE OLDER ONE THAT IS DISSIMILAR TO IT AND FORMS COMPLEX DISEASE. 

Hahnemann have suggested few examples

Thus a syphilitic patient may become psoric, and vice versa. As two disease dissimilar to each other, they cannot remove, cannot cure one another. 

At first the venereal symptoms are kept in temporary cessation and suspended when the psoric eruption begins to appear; in course of time, however (as the syphilis is at least as strong as the psora), the two join together,¹ that is, each involves those parts of the organism only which are most adapted for it, and the patient is thereby rendered more diseased and more difficult to cure.

Hahnemann further gives examples of acute diseases

When two dissimilar acute infectious diseases meet, as, for example, 

smallpox and measles, the one usually suspends the other, as has been before observed; yet there have also been severe epidemics of this kind, where, in rare cases, two dissimilar acute diseases occurred simultaneously in one and the same body, and for a short time combined, as it were, with each other. During an epidemic, in which smallpox and measles were prevalent at the same time, among three hundred cases (in which these diseases avoided or suspended one another, and measles attacked patients twenty days after the smallpox broke out, the smallpox, however, from seventeen to eighteen days after the appearance of the measles, so that the first disease had previously completed its regular course).

one single case in which P. Russell ² met with both these dissimilar diseases in one person at the same time. 

Rainey³ witnessed the simultaneous occurrence of smallpox and measles in two girls. 

J. Maurice⁴, in his whole practice, only observed two such cases. Similar cases are to be found in Ettmuller’s ⁵ works, and in the writings of a few others.

Zencker⁶ saw cow-pox run its regular course along with measles and along with purpura.

The cow-pox went on its course undisturbed during a mercurial treatment for syphilis, as Jenner saw.

Note that four proposition regarding two disease occurring in the same body. First three proposition regarding two dissimilar disease occuring in the same body  The first suggestion:  the two dissimilar diseases meeting together in the human being be of equal strength, or still more if the older one be the stronger, the new disease will be repelled by the old one from the body and not allowed to affect it. (aphorism 36)  The second suggestion: the new dissimilar disease is the stronger. In this case the disease under which the patient originally labored, being the weaker, will be kept back and suspended by the accession of the stronger one, until the latter shall have run its course or been cured, and then the old one reappears uncured. (aphorism38) The third suggestion: the new disease after having long acted on the organism ,at length joins the older one that is dissimilar to it and forms complex disease. (aphorism 40). Last and the fourth  proposition is regarding  two similar disease occurring in the same body.

Much more frequent than the natural diseases associating with and complicating one another in the same body are the morbid complication resulting from the art of the ordinary practitioner, which the inappropriate medical treatment (the allopathic method) is apt to produce by the long-continued employment of unsuitable drugs. To the natural disease, which it is proposed to cure, there are then added, by the constant repetition of the unsuitable medical agent, the new, often very tedious, morbid conditions which might be anticipated from the peculiar powers of the drug; these gradually coalesce with and complicate the chronic malady which is dissimilar to them (which they were unable to cure by similarity of action, that is, homœopathically), adding to the old disease a new, dissimilar, artificial malady of a chronic nature, and thus give the patient a double in place of a single disease, that is to say, render him much worse and more difficult to cure, often quite incurable. Many of the cases for which advice is asked in medical journals, as also the records of other cases in medical writings, attest the truth of this. Of a similar character are the frequent cases in which the venereal chancrous disease, complicated especially with psora or with the venereal chancrous disease, complicated especially with psora or with dyscrasia of condylomatous gonorrhoea, is not cured by long-continued or frequently repeated treatment with large doses of unsuitable mercurial preparations, but assumes its place in the organism beside the chronic mercurial affection¹ that has been in the meantime gradually developed, and thus along with it often forms a hideous monster of complicated disease (under the general name of masked venereal disease), which then, when not quite incurable, can only be transformed into health with the greatest difficulty.

¹ For mercury, besides the morbid symptoms which by virtue of similarity can cure the venereal disease homœopathically, has among its effects many others unlike those of syphilis, for instance, swelling and ulceration of bones, which, if it be employed in large doses, causes new maladies and commit great ravages in the body, especially when complicated with psora, as is so frequently the case.

Much more frequent than the natural diseases associating with and complicating one another in the same body are the morbid complication resulting from the art of the ordinary practitioner, which the inappropriate medical treatment (the allopathic method) is apt to produce by the long-continued employment of unsuitable drugs. To the natural disease, which it is proposed to cure, there are then added, by the constant repetition of the unsuitable medical agent, the new, often very tedious, morbid conditions corresponding to the nature of this agent; these gradually coalesce with and complicate the chronic malady which is dissimilar to them (which they were unable to cure by similarity of action, that is, homœopathically), adding to the old disease a new, dissimilar, artificial malady of a chronic nature, and thus give the patient a double in place of a single disease, that is to say, render him much worse and more difficult to cure, often quite incurable. Many of the cases for which advice is asked in medical journals, as also the records of other cases in medical writings, attest the truth of this. Of a similar character are the frequent cases in which the venereal chancrous disease, complicated especially with psora or with the venereal chancrous disease, complicated especially with psora or with dyscrasia of condylomatous gonorrhoea, is not cured by long-continued or frequently repeated treatment with large doses of unsuitable mercurial preparations, but assumes its place in the organism beside the chronic mercurial affection¹ that has been in the meantime gradually developed, and thus along with it often forms a hideous monster of complicated disease (under the general name of masked venereal disease), which then, when not quite incurable, can only be transformed into health with the greatest difficulty.

¹ For mercury, besides the morbid symptoms which by virtue of similarity can cure the venereal disease homœopathically, has among its effects many others unlike those of syphilis, for instance, swelling and ulceration of bones, which, if it be employed in large doses, causes new maladies and commit great ravages in the body, especially when complicated with psora, as is so frequently the case.

commentary:

ALLOPATHY 

More frequently ( than the natural diseases associating with and complicating one another in the same body) allopathic drugs  that bring about  different  or dissimilar state  of the diseased individual is apt to produce morbid complication. To already existing disease they are adding one more disease by unsuitable medicine with constant repetition, produce different symptoms (allopathic medicines) than the disease to cured. These symptoms of allopathic medicine  gradually combine with and complicate the chronic sickness which is dissimilar to them , adding to the old disease a new, dissimilar, artificial malady of a chronic nature, and thus give the patient a double in place of a single disease, that is to say, render him much worse and more difficult to cure, often quite incurable (which they were unable to cure by similarity of action, that is, homœopathically). Hahnemann further gives examples of such allopathic drugs disease which complicate the original disease.

Let me give you some examples from modern allopathic world

antibiotics

                                                                § 42

Hahnemann has further observed that nature permits two or more dissimilar diseases  occurring in the same body (he also mentions that in aphorism  ). He brings authentic evidence from the nature that two dissimilar natural disease occurring in the same body or by taking prolonged taking of drugs in the allopathy (which also brings dissimilar state than disease to be cured)

do not remove

do not annihilate and 

cannot cure one another, 

both symptoms produced by the (allopathic) drug  in natural disease as well as two or more natural disease occurring in the same organism  remain, as it were, separate in the organism, and each takes possession of the parts and systems peculiarly appropriate to it, which, on account of the want of resemblance of these maladies to each other, can very well happen without disparagement to the unity of life.

Totally different, however, is the result when two similar disease meet together in the organism, that is to say, when to the disease already present a stronger similar one is added. In such cases we see how a cure can be effected by the operations of nature, and we get a lesson as to how man ought to cure.

commentary:

Hahnemann has  further observed that when two similar disease meet together in organism, when stronger one is added to disease already present, in such cases cure can be affected even in the nature.