I know of a gentleman in an adjoining county, who with his lady has been living for some time past on a purely vegetable diet. They have not continued it long enough, however, to make the experiment a fair one.

No case of injury from the inhalation of arseniuretted hydrogen has come under my own personal observation, if we except the one above alluded to. I find, however, that Gehlen, a celebrated French chemist, fell a victim to it in the year 1815. His death is thus announced in the "Philosophical Magazine" for that year. "We lament to have to announce the death of Gehlen, many years the editor of an excellent Journal on Chemistry and other sciences, and a profound chemist. He fell a victim to his ardent desire to promote the advancement of chemical knowledge. He was preparing, in company with Mr. Rehland, his colleague, some arsenated hydrogen gas, and while watching for the full development of this air from its acid solution, trying every moment to judge from its particular smell when that operation would be completed, he inhaled the fatal poison which has robbed science of his valuable services." Vide Tillock's Phil. Mag., vol. 46, p. 316. Some further notice is taken of his death in a paper extracted from the "Annales de Chimie et de Physique," and published in a subsequent volume of the same Magazine. Vide vol. 49, p. 280, in which are given his last experiments on that subject, by M. Gay Lussac. I regret that no account is given in the same work of the symptoms arising from the poison in his case. I presume, however, they are on record.

In the subject of the case I mention, the general and prominent symptoms were an immediate and great diminution of muscular strength, with pallor of countenance and constant febricula, the arteries of the head beating with violence, particularly when lying down at night, the pulse always moderately increased in frequency, and full, but not tense; and digestion for the most part good. This state continued for about three months, during which time he was attending to his usual business, although not able to take as much exercise as before. At the end of this time he began to recover slowly, but it was six months before he was restored entirely.

Yours, etc.,

John M. B. Harden.

LETTER III.—FROM DR. JOSHUA PORTER.

North Brookfield, Oct. 26, 1827.

Though I would by no means favor the propensity for book-making, so prevalent in our day, yet I have been long of the opinion that a work on vegetable diet for general readers was greatly needed. I need it in my family; and there are many others in this vicinity who would be materially benefited by such a work.

I have had no means of ascertaining the good or bad effects of a "diet exclusively vegetable in cases of phthisis, scrofula, and dyspepsia," for I have had none of the above diseases to contend with. But, since your letter was received, I have been called to prescribe for a man who has been a flesh eater for more than half a century. He was confined to his house, had been losing strength for several months, still keeping up his old habits. The disease which was preying upon him was chronic inflammation of the right leg; the flesh had been so long swollen and inflamed that it had become hard to the touch. There were ulcers on his thigh, and some had made their appearance on the hip. This disease had been of seven months' standing, though not in so aggravated a form as it now appeared. During this time, all the local applications had been made that could be thought of by the good ladies in the neighborhood; and after every thing of the kind had failed, they concluded to send for "the doctor."

After examining the patient attentively, I became convinced that the disease, which developed itself locally, was of a constitutional origin, and of course could not be cured by local remedies. All local applications were discontinued; the patient was put on a vegetable diet after the alimentary canal was freely evacuated. I saw this man three days afterward. The dark purple appearance of the leg had somewhat subsided; the red and angry appearance about the base of the ulcers was gone, his strength improved, etc. Three days after I called, I found him in his garden at work.