I learned that "Murphy's Law" has a little known but very important addendum.
The radius of the pitch-circle of a wheel is called the geometrical radius; a circle touching the ends of the teeth is called the addendum circle, and its radius the real radius; the difference between these radii, being the projection of the teeth beyond the pitch-surface, is called the addendum.
The replacing of the sequel of Amos (q.v.) by one which presupposes a later historical background, the addendum to the prophecy against Moab (Isa.
He appears to have joined the Homoean party, which took shape and acquired influence before the council of Constantinople in 360, where he adhered with the rest of the council to the creed of Ariminum, with the addendum that in future the terms inroTTao-cs and oucla should be excluded from Christological definitions.
In practice it is usual to make the path of contact somewhat longer, viz, about 2.4 times the pitch; and with this length of path, and the obliquity already mentioned of 143/4, the addendum is about 3~I of the pitch.
The path of contact is bounded where the approach commences by the addendum-circle of the follower, and where the recess terminates by the addendum-circle of the driver.
The programme, however, expressly excluded for " weighty political reasons affecting great interests of the nation " the question of the military language; and on Tisza's motion the Liberal party adopted an addendum, sanctioned by the crown: " the party maintains the standpoint that the king has a right to fix the language of service and command in the Hungarian army on the basis of his constitutional prerogatives as recognized in clause 1 i of law XII.