Gulfs may be classified according to their origin as due to fractures of the crust or overflowing of depressed lands.
Since by international agreement the wilful damage of a cable has been constituted a criminal offence, and the cable companies have avoided crossing the fishing banks, or have adopted the wise policy of refunding the value of anchors lost on their cables, the number of such fractures has greatly diminished.
Two treatises by him are extant: On Fractures (in J.
('E7rch,utcov a Kai -y'); (5) On Regimen in Acute Diseases (IIEpi cairns o Ewv); (6) On Airs, Waters, and Places (IIEpi cthpwv, l'6aTwv, Kai rorrwv); (7) On the Articulations (IIEpi etpBpwv); (8) On Fractures (IIEpi by c&v); (9) The Instruments of Reduction (M0xXix6s); (Jo) The Physician's Establishment, or Surgery (Kar' i rpEiov); (II) On Injuries of the Head (IIEpi KE0aXij TpwpaTwv); (12) The Oath ("OpKoi); (13) The Law (Nopos).
The influence of wind and tide breaks up the frozen surface of the sea, and sheets yielding to the pressures slide over or under one another and are worked together into a hummocky ice-pack, the irregularities on the surface of which, caused by repeated fractures and collisions, may be from 10 to 20 ft.