Whatever the obligations of the state towards the ecclesiastical society may be in pure theory, in practice they become more precise and stable when they assume the nature of a bilateral convention by which the state engages itself with regard to a third party.
Voluntary enlistments in the French army are permissible, within certain limits, at the age of eighteen, and the engages serve for at least three years.
In its revolution one of its cams engages with the correcting wheel attached to the type-wheel in order to ensure that the latter is in the correct position for printing a complete letter; the second cam lifts the paper against the type-wheel and prints the letter; the third moves forward the paper tape one space to be ready for the printing of the next letter; and the last cam replaces the armature on the cores of the electromagnet.
In rack railways a cog-wheel on the engine engages in a toothed rack which forms part of the permanent way.
Agriculture engages the greater part of the resident population, both male and female; other industries, except the fisheries, are little developed.
Fruit farming engages attention, about 8000 morgen being devoted to orchards in 1904.
Thus, he engages in combat with Heracles on two occasions to avenge the death of his son Cycnus; once Zeus separates the combatants by a flash of lightning, but in the second encounter he is severely wounded by his adversary, who has the active support of Athena; maddened by jealousy, he changes himself into the boar which slew Adonis, the favourite of Aphrodite; and stirs up the war between the Lapithae and Centaurs.
The national council engages in mission work on a large scale, and a considerable number of periodicals, hymn-books for special occasions, and works of different kinds explaining the history and ideals of the Evangelical Free Churches have been published.
The pastoral industry dates from colonial times and engages the services of a considerable number of people, but its comparative importance is not great.
The rims of pulleys for hemp or other ropes or cords are grooved, and the sides are usually either inclined at 45° or curved to give a sharper angle at the outside than at the bottom of the groove; in the latter case, as the rope wears it engages in a groove of greater angle and less effective grip. Wire ropes are injured by the lateral crushing of the material, and in this case the grooves are wide enough to allow the rope to rest on the rounded bottom, which is lined with leather or wood to diminish the wear and increase the friction.
In Plato's Parmenides, Socrates, "then very young," meets Parmenides, "an old man some sixty-five years of age," and Zeno, "a man of about forty, tall and personable," and engages them in philosophical discussion.
It also works coal-fields at Yentai and Fushun; has a line of steamers plying between Tairen and Shanghai; and engages in enterprises of electricity, warehousing and the management of houses and lands within zones 50 Ii (17 m.) wide on either side of the line.