Weight used.
Resistance in
circuit.'


Volts per division
of ti.xed scale.
First Pair of Weights


400

800

1200

1600


I.O
2-0
3-0

4-0



If the second pair of weights is used, the constants will be double of
those noted above.
13. Instructions for the Adjustment of the Standard
Balances. — The instrument should be levelled in accordance with
the indications of the attached spirit-level, by means of the levelling
screws on which the sole-plate of the instrument stands.
14. In this centi-ampere balance, the beam can be lifted oft' its
supporting ligaments by turning a handle attached to a shaft passing
under the sole-plate of the instrument. This shaft carries an eccentric,
on the edge of which rests the lower end of a vertical rod, which is
fi.xed at its upper end to a tripod lifter. When the instrument is to be
packed for carriage, or when it is to be removed by hand from place
to place, the lifter should be raised ; but when it is fixed up for regular
use, it is advisable to keep the beam always hanging on the ligaments.
