Hour-glass, or Sand-glass: this device is borne only on two or three coats of arms. In connection with the Bible, it has possibly a reference to the preaching by the hour.
Party per chevron embattled or and gules, three roses counterchanged slipped vert; on a chief of the second three hour-glasses argent framed of the first--John WHITE, Bp. of Lincoln, 1534; of Winchester, 1557-59.
Vert, in chief the holy Bible expanded proper; in base a sand-glass running argent--JOASS, Scotland.
Vert, on a chevron between three hour-glasses argent as many trefoils slipped of the first--SHADFORTH, Northumberland.
Vert, three hour-glasses in bend proper between two bendlets argent--ANDERTON, co. Lancaster.