Transmissibility. Only from one bird Mammals are unaffected by to another, except the tuberculosis of birds, in the case of the and _vice versa_. parrot. [H] I have tabulated shortly their various characteristics. Ever since this variety of tuberculosis has been distinguished, attempts have been made to inoculate or cure human tuberculosis with that of birds. In our school the thing has been attempted at the Hôpital St. Jacques, where _Aviaire_ has been administered in homoeopathic dilutions, in potions or through punctures in cases of consumption. As a matter of fact, neither allopaths nor homoeopaths have succeeded in obtaining a formula which will cure consumption with the virus of birds. Amelioration has been noted as with other remedies, but never a series of authenticated cures. Nevertheless, in every country experiments are continually being made; we must hope that they will end in a more decisive success than is at present the case. Hoping to profit by the homoeopathicity of an active virus, I was, I think, one of the first who employed _Aviaire_ in non-tuberculous respiratory affections on the lines of _Bacillinum_, and I am bound to say that up to the present my faith in the law of similars has not been shaken by my experiments. In _L'Art Médical_ (August, 1895) I published a number of cases in which I successfully treated localized bronchitis, generally the result of influenza, and reproducing the symptoms of tuberculosis, with _Aviaire_. The most characteristic of all these observations is that of which I have spoken above. The patient was restored to health as if by magic with _Aviaire_ within three weeks. Dr. P. Jousset, anticipating my observations, thus expressed himself in the number of _L'Art Médical_ preceding the one which contained my remarks: "A young woman entered the Hôpital St. Jacques at the end of January, 1895, with feverish influenzal bronchitis. At first the patient was treated with small doses of _Sulphate of Quinine_, and a little later she took _Ipecac_ and _Bryonia_ alternately. The fever disappeared and the general condition improved considerably, and the sub-crepitant râles became confined to the top of the left lung. The patient continued to expectorate thick nummular and puriform sputa, as in the influenza. After some days the disease resumed its sway, the bodily forces diminished, the emaciation made great progress, and local and general signs indicated rapid consumption. Bacteriological analysis led to the detection of numerous Koch's bacilli. I gave over the case at this time, and some weeks afterwards I learnt with surprise that the patient was well and growing fat, and that the inoculation of the sputa had produced no effects. The cure has been maintained for three months, and the young woman has resumed her employment." I had prescribed _Aviaire_ 100th, five drops a