Before leaving this subject, it may be well to allude to Mr. Parton's remarks (p. 35) about "pallid," "yellow," "sickly," and "cadaverous," tobacco-manufacturers. He evidently means to convey the impression that workers in tobacco are more unhealthy than other workmen. Upon this point we shall content ourselves with transcribing the following passage from Christison, _On Poisons_, p. 731:--"Writers on the diseases of artisans have made many vague statements on the supposed baneful effects of the manufacture of snuff on the workmen. It is said they are liable to bronchitis, dysentery, ophthalmia, carbuncles, and furuncles. At a meeting of the Royal Medical Society of Paris, however, before which a memoir to this purport was lately read, the facts were contradicted by reference to the state of the workmen at the Royal Snuff Manufactory of Gros-Caillou, where 1000 people are constantly employed without detriment to their health. (_Revue Médicale_, 1827, tom. III. p. 168.) This subject has been since investigated with great care by Messrs. Parent-Duchatelet and D'Arcet, who inquired minutely into the state of the workmen employed at all the great tobacco-manufactories of France, comprising a population of above 4000 persons; and the results at which they have arrived are,--that the workmen very easily become habituated to the atmosphere of the manufactory,--that they are not particularly subject either to special diseases, or to disease generally,--and that they live on an average quite as long as other tradesmen. These facts are derived from very accurate statistical returns. (_Annales d'Hygiène_, 1829, tom. I. p. 169.)" The reader may also consult an instructive notice in Hammond's _Journal of Psychological Medicine_, Oct. 1868, vol. II. p. 828. [28] See Dr. Derby's pamphlet on _Anthracite and Health_, Boston, 1868; and an article by the present writer, in the _World_, April 11th, 1868.