JAR

n. Jasr. Fr.,jarre. Ger., Krug. A ve el with a wide mouth. Decanting j. A gla j. fitted with a movable siphon tube entering near the bottom; used for decanting the liquid over precipitates that are very easily disturbed. ["Proc. of the Am. Pharm. A oc.," xxiii (a, 39).] Leydeii j. Ger., Leydener Flasche. A gla j. coated on the inside_ and outside with tin-foil, the inner coating having in contact with it a metallic rod which projects from the mouth of the j. and terminates in a knob. The j. is charged by placing the knob in contact with a static machine and putting the outside coating in communication with the ground by a metallic knob brought near the j. Sparks are thus drawn from the machine to the inner coating and are lodged upon the surface of the gla . The j. is discharged by placing one knob of the discharging rod in contact with the outer coat and turning the other knob close to the inner coating, from which a spark is immediately elicited. [B.] [s. 510]