"The small particles of cotton and dust with which the air in most rooms of factories is impregnated not infrequently lay the foundation of distressing and fatal diseases. When inhaled, they are a source of great pulmonary irritation, which, if it continues long, induces a species of chronic bronchitis, which, not rarely, degenerates into tubercular consumption.... "IV. The fourth cause of the ill-health which prevails among the manufacturing population may be traced to the injurious influence which the weakened and vitiated constitution of the women has upon their children.[73] They are often employed in factories some years after their marriage, and during this pregnancy, and up to the very period of their confinement, which all who have attended to the physiology of the subject know must send their offspring into the world with a debilitated and unhealthy frame which the circumstances of their infancy are ill-calculated to remove; and hence, when these children begin to work themselves they are prepared at once to succumb to the evil influences by which they are surrounded." At page 27. "We hope we shall not greatly offend the prejudices either of political economists or practical tradesmen when we state our firm conviction, that a reduction in the hours of labour is _most important_ to the health of the manufacturing population, _and absolutely necessary_ to any general and material amelioration in their moral and intellectual condition.... It will be urged in opposition that all legislative interference in commercial concerns is, _prima facie_, objectionable, and involves the admission of a dangerous and impolitic principle. That legislative interference is in itself an evil we deeply feel and readily admit; but it is an evil like many others which necessity and policy may justify, and which humanity and justice may imperiously demand. Legislative interference is objectionable only where it is injudicious or uncalled for. It will also be objected, and with more sound reason, that a reduction of the hours of labour would cause a corresponding reduction in the quantity produced, and consequently in the wages of the workmen; and would also diminish our power of competing with other manufacturing nations in foreign market, and thus, by permanently injuring our trade, would be productive of greater evils to the labouring classes than those we are endeavouring to remove. This objection, though very reasonable, we think is considerably overstated. That 'a reduction of the hours of labour would cause a _corresponding_ reduction in the quantity produced' we entirely deny. What _would_ be the actual loss consequent upon a reduction of the hours it is impossible to state with any certainty, but it is probable that if factories were to work ten hours instead of twelve the loss in the quantity produced would not be one-sixth, but only about one-twelfth, and in Mule Spinning perhaps scarcely even so much. We