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July 6.-I do not mean often to trouble you with my peculiar employments, but a circumstance of some interest has grown out of them, which I shall now take the liberty of n.entioning. I pass three or four hours, every morning, in professional pursuits, with able masters, and a part of that time I employ with Mr. Accum, one of the best practical chemists in this country; my object is to repeat in his laboratory, and with his assistance, such ehemical operations as áre more particularly difficult and eritical. Of late, I have found myself growing very unwell, and with a train of symptoms which affected me in a manner quite novel : an insupportable languor has, for several days, pervaded my limbs, and rendered every exertion painful; while an extremely disordered stomach has deprived me equally of the power and the di position to receive any support from food. As these distressing sensations had been rapidly increasing, I was led to cast about me for the cause, when I recollected that, not long before, I had been occupied, for some time, in the laboratory, while it was filled with the poisonous fames arising from a mixture of arsenic and red hot nitre, upon which we were operating. I then remembered that I had since heard Mr. Accum complain of similar sensations, and I could no longer be at a loss for the cause. Although I had, in a degree, persevered in active employments, I had been obliged, occasionally, to resort to my bed in the day time. It is not necessary to expatiate upon the deleterious properties of arsenic ; unhappily they are but too well known in the dreadful memoirs of private poisoning. Probably arsenic inhaled into the lungs is not less poisonous than when received into the stomach. The miserable convicts who work in roasting the ores of Cobalt in Saxony, one object of whose labour is to collect the arsenic, which, in copious white fumes, is abundantly exhaled by heat from these ores, survive but a few years, and are the victims of a grievous train of maladies.*

Undoubtedly, all persons who operate upon arsenic, should avoid the fumes, for, although it is a very dense and heavy mineral, it rises in a cloud of snowy vapour, far below a red heat, and is readily drawn into the lungs with the air : these fumes should always be allowed to pass up a chimney.

Being convinced that moderate exercise was the best thing to restore the tone of my muscles, and that cheerful

· Aug. 1818. The Journals have recently informed us of the death of the celebrated German chemist, Gehlen, wlio imprudentiy breathed the arseniated hydrogen gas; but no more than by smelling it as it was evolved from the materials. He languished in dreadful tortures, and no resource of art or skill could save him.

society would counteract that downward tendency of the mind which is produced by its sympathy with the languor of the body, I commenced a slow walk toward Finsbury Square, which is nearly three miles from my lodgings. I gained strength from the exertion, and performed the walk with only one resting spell, and that at a bookseller's shop, where I found amusement from the news and literary topies of the day.

In Finsbury Square I met


at the house of Mr. Williams, late American Consul for the port of London. From this gentleman I had received a series of kind and useful attentions, which made his house a home, and in this I was not alone, for few men ever rendered themselves more useful to their countrymen abroad, or more respected by the people of the country. At his house to-day, as had often happened before, I met a party exclusively American. Although, as I have before remarked, a traveller should rather avoid than seek the society of his countrymen, still, there is a feeling of country, which may sometimes be advantageously indulged by a temporary association with people whose habits and feelings, whose very prejudices and follies, correspond with our own. I dined with an American circle to-day, and found a correspondence of views and opinions, which has rarely failed to shed over such parties a peculiar interest, and to produce a peculiar gratification.

There was present a brother of the celebrated Madame Jerome Bonaparte, now attending his unfortunate sister, whose recent repulse from the shores of the continent, ex

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