Back-fire, [192], [214]

Bacteria, [100], [101], [127]

Balances, [225]

Balling hydrometer, [238]

Barometer, [239], [240]

Barrel, [167], [228], [229]

Basin, catch, [127]

Battery, [192], [193], [194], [215], [216]

Baume hydrometer, [237]

Bearing, [152]