Crith n. (Chem.) The unit for estimating the weight of aeriform substances; the weight of a liter of hydrogen at 0° centigrade, and with a tension of 76 centimeters of mercury. It is 0.0896 of a gram, or 1.38274 grains.
... bhi seoladh stigh ri bhun, Chaidh slabhraidh a chuir a nuas; S roimh an t slabhraidh cha do ghabh-ar crith Ach chaidhearurra na m'ruith suas. S roimh ... — Memories of Canada and Scotland - Speeches and Verses • John Douglas Sutherland Campbell