SEARCH Articles Figures Tables A-1 gives some derived SI units, together with some other units which are still commonly employed. It is likely that the calorie will remain in use for some time, since there has accumulated a vast scientific literature which employs calories for example, practically every table of enthalpies of formation gives the values in calories. In this book we have retained the use of calories, and also of atmospheres and occasionally millimetres of mercury, which are still in common use. [Publishers Imprint]