Mud. (See Sediment.)
Negative. The terminal of a source of electrical energy as a cell, battery or generator through which current returns to complete circuit. Generally marked "Neg." or "-".
Ohm. The unit of electrical resistance. The smaller the wire conductor the greater is the resistance. Six hundred and sixty-five feet of No. 14 wire (size used in house lighting circuit) offers I ohm resistance to current flow.
Oil of Vitriol. Commercial name for concentrated sulphuric acid (1.835 specific gravity). This is never used in a battery and would quickly ruin it.
Over-Discharge. The carrying of discharge beyond proper cell voltage; shortens life if carried far enough and done frequently.
Paste. The mixture of lead oxide or spongy lead and other substances which is put into grids.
Plate. The combination of grid and paste properly "formed." Positive$ are reddish brown and negatives slate gray.
Polarity. An electrical condition. The positive terminal (or pole) of a cell or battery or electrical circuit is said to have positive polarity; the negative, negative polarity.
Positive. The terminal of a source of electrical energy as a cell, battery or generator from which the current flows. Generally marked "Pos." or "+".
Post. The portion of the strap extending through the cell cover, by means of which connection is made to the adjoining cell or to the car circuit.