Burdens, or heavy loads, cannot fail to be injurious to the lungs because the person carrying them is obliged to inspire and expel the air with greater force than is designed by Nature. Those who, either from imprudence, or a mis-taken economy, exceed the limits of their strength, by doing at once what should be performed at two different times, expose themselves to various degrees of danger. Thus persons supporting heavy burdens, as porters, colliers, and day-labourers, in general, by over-straining the tender vessels of the breast and lungs, frequently become liable to blood-spitting, asthma, ruptures, pleurisies, etc. This fatality is apparently generated in early youth, from an absurd and hurtful notion, that the children of working people should be timely accustomed to hard labour. Every humane master of a family, as well as the more judicious neighbours of cottagers, ought seriously to warn those bold adventurers of the imminent danger to which they expose themselves by such imprudence. Young females, in particular, should be stopped in the streets, when walking with heavy loads on their heads; a measure no less necessary than that of. removing an infant from the precipice of a window. From the pressure of such burdens, on the vessels of the brain, young persons become stupified ; an effect which is obvious to every accurate observer. In countries, where the inhabitants carry all their water and other commodities on the head, many are afflicted with scrophaulons complaints: complaints : but the worst consequences of this practice are, weak lungs, and a constant disposition to cough and catarrh, which frequently terminate in incurable consumption.