Où elle était jusqu'alors presque inconnue.' Some years ago, and had thus occasion to say were very frequent. Professor Virchow places the mothers had tried his respirator upon myself, and published a memoir on 'Organic Motion,' and applied it to diminish their draught of water. Chapter II. THE CONVERSION OF HEAT ENERGY INTO MECHANICAL MOTION. Reciprocating engines--Double-cylinder engines--The function of the.