The Milroy Lectures ON THE EARTH IN RELATION TO THE PRESERVATION AND DESTRUCTION OF CONTAGIA

1899 The Lancet  
EARTH. MR. PRESIDENT AND GENTLEMEN,-That which we commonly speak of as " earth " is largely composed of excreta and the dead remains of animals and vegetables which, as the result of fresh biological processes, are either returned to the bodies of living vegetable organisms or, after becoming mineralised and soluble, are washed downwards by the rain and ultimately find an exit in the sea. It is obvious that not only does "earth" vary in composition with the varying conditions of subsoil,
more » ... of subsoil, climate, flora and fauna, but that "earth" must undergo seasonal variations necessitated by the vigorous upgrowth in the spring or the decay of the fall-the heat and drought of summer or the flood and frost of winter. The interstices between the particles of earth" " are filled at one time with air, at another time with water, and the line of demarcation between earth and air on the one hand and earth and water on the other is often not very definite.
doi:10.1016/s0140-6736(01)67139-3 fatcat:go7p5oi2tvcgxomaxj4h4ecjaa