We assume that the body receives arbitrary twists about twc given screws, and it is required to determine the character of the resultant displacement.
Now nickel contracts instead of lengthening when it is magnetized, and an experiment by Knott showed, as he expected, that caeteris paribus a nickel wire twists in a sense opposite to that in which iron twists.
Those who only know the Snipe as it shows itself in the shooting-season, when without warning it rises from the boggy ground uttering a sharp note that sounds like scape, scape, and, after a few rapid twists, darts away, if it be not brought down by the gun, to disappear in the distance after a desultory flight, have no conception of the bird's behaviour at breeding-time.
After impregnation, the male twists them round his legs and returns to his usual retreat, going about at night in order to feed himself and to keep up the moisture of the eggs, even resorting to a short immersion in the water during exceptionally dry nights.
Long strings of camels may still be seen from the train windows patiently treading their slow way over the Khojak pass to Kila Abdullah, whilst the train alongside them rapidly twists through the mountain tunnel into the Peshin valley.