* KENT'S TORSION BALANCE.

Making a torsion test on hickory 50.

The immediate results of observation, however, began to excite suspicion; and after a time it was found that, in spite of the length of the suspending wire (about 8 feet) the torsion-coefficient was not much less than 1/6.

Carpenter torsion impact testing machine.

Hardening his neck muscles until they covered the delicate parts beneath like bands of steel, the detective seized his enemy's extended arm in his two hands, one at the wrist, one at the elbow, and as his trained fingers sought the painful pressure points, his two free arms started a resistless torsion movement on the captured arm.

For ordinary balances on the torsion system, in which extreme sensitiveness is not needed, the trouble caused by change of level of the scale is insignificant; but it becomes a matter of importance in more sensitive scales, such as fine analytical balances in places where it is impossible to keep the table or support of the scale level, for instance on shipboard.

In spite of the torsion torture, he had swung his free arm under the detective's lifted guard, not in Yokohama style but in the best manner of the old English prize ring, his clenched fist falling full on the point of the heart, full on the unguarded solar-plexus nerves which God put there for the undoing of the vainglorious fighters.