OANNES, in Babylonian mythology, the name given by Berossus to a mythical being who taught mankind wisdom. He is identical with the god Ea (q.v.), although there may not be any direct connection between the two names. Berossus describes Oannes as having the body of a fish but underneath the figure of a man. He is described as dwelling in the Persian Gulf, and rising out of the waters in the daytime and furnishing mankind instruction in writing, the arts and various sciences. The culture-myth on which the account of Berossus rests has not yet been found in Babylonian literature, but there are numerous indications in hymns and incantations that confirm the identification with Ea, and also prove the substantial correctness of the conceptions regarding Oannes-Ea as given by Berossus. (M. Ja.)
OAR (A.S. dr; M. Eng. ore; Lat. rémus; Gr. éper/Jbs: Sans. afilra; Fr. fame; Ital. Span., Port. rama), the instrument used for
propelling a boat in rowing (q.v.). The word “ oar ” is probably
derived from an old root ar, meaning to drive, to force away
(cf. ar-ar-e, aralrum, plough). Such an appellation would easily
be suggested by the visible difference in the action of the power
employed by means of the oar against' a thowl, or rowlock,
from that of the more primitive paddle, where the power is
gained by the action of one hand against the other. In the
development of rowing from paddling the task of shaping the
instrument of propulsion must have followed gradually the
necessities indicated by use. In rowing, as well as in paddling,
the leverage is of the second order, in which the weight lies
between the power and the fulcrum The point at which the
power pressed the arm of the lever against the weight in rowing
would soon attract attention by the frequent breakage of the
paddle so employed. Experience would demand a thicker loom,
and would soon teach the desirability of increasing the leverage
where possible, and upon this would arise naturally the practical
questions of the length of the oar, of the breadth of the blade,
and of the right proportion of the parts of the oar, inboard and
outboard, to each other. Then would also occur the problem
of how to keep this proportion, which
in practice would be liable to disas
oars. Paddle-shaped also are the oars of the Phoenician ships shown on the Assyrian sculptures at Koyunjik (Layard), the date of which is about 700 B.c. The same form is seen on some of the early vases, but in some that are attributed to two centuries later the form is modified, and the oar blade proper begins to take shape.
The types exhibited in the representations of the Roman galleys are generally heavy and clumsy enough in appearance. Still they are veritable oars, not paddles. The material of which the ancient oars were usually made was pine, which then, as now, was most suitable for the purpose, being tough and comparatively light and easily shaped as regards loom and blade.
The oars of the Attic trireme were, if we may judge by those of which only we have the measurement recorded, not much longer for the upper bank than those of a modern racing eight, while those of the middle and lower banks could not have been much longer than those used now in the Whalers and dinghies of the Royal Navy. As the oarsmen on either side probably sat in the same vertical plane, the inboard portion of the oars amidships was longer than the inboard of those fore and aft, having to conform to the curvature of the vessel's sides (cf. Aristotle, M echanica, v.) No doubt in vessels of larger size the upper tiers of oars would be longer, and, 'if we are to believe Callixenus, as cited by Athenaeus, in the great ship of Ptolemy the oars of the upper tier were over 50 ft. in length with handles leaded so as to equalize the weight inboard and outboard. A
It is difficult to trace any detail of difference between the oars of the Roman period and those of the Byzantine and medieval galleys. In the medieval galley by the invention of the “ apostis, " a framework on which the thowls were fixed, sufficient room was given for the play of longer oars, and, as the necessity of combining speed with greater carrying power in the galley became pressing, the arrangement alla scaloccia came into vogue, employing four or five or even seven men to each of the long Table showing Oars 'used in Royal Navy. arrangement by the slipping outward
of the oar during the recovery from
each stroke. Hence would arise the
use of the thong (rporrbs, fpovrwrhp), familiar to ancient Greek and modern
Levantine, and, in northern and
western waters, the invention of the
“ button, ” with which in various
shapes the rowing world is now provided. Other devices, such as a hole
bored in a piece of wood attached to
the oar, or even a metal ring, will, in different localities, be found answering the same purpose.
In the early stages of the transition from paddling to rowing, the oar
would naturally be used at an acute
angle vertically to the' boat's side. In paddling the upper hand is used
Description of oars' Blmies' Material No. Vessel. - ' ' allowed
Length. Thickness. Length. Breadth.
L h ' . - 6 1- 1 's” U ' s
1 aunc es, 42 17. .1 gilt” gé”
2. Pinnaces, 36' 17-16 . ., 16
32; - 12-15 15 2%-1% 5'0" st” I4
30 1 -15 . .. . I2
3. Cutters, 34; 1; 14 14 2 -1% 4' 8" 5%” I4 32 . 1 -14 . gn I4
30' 15-14 . . . 15 I2
28' . 15-14 A ro
26' . 15-14 3 IO
H gig, 20' » 1544 tv 4
4. Galleys 32' . 17-16 .tl 6
5. Gigs, 30' 17-16 é 6
28' 17-16 . . . . » 6
6. Whalers, 27' 15-14 . . . W . 5
132-I? 4;4” 52” ..*
7. Skrii dinghies, 16 10-8, 13 £53 gi 4 45, 4 - 4 . .
8. Dinghies, r3%'. 10-8 8 1%-1% 2' ro” 4;" 4
to push from you, 'the lower hand to
pull towards you. But in rowing
both hands are used to pull towards
you. As long as the oar was used at
an acute angle vertically to the boat's side, the position of the upper hand
on the oar would have to be reversed, as it would more easily grasp the oar with the wrist turned inward towards the body. In many of the earlier representations of rowing this position of the upper hand seems to be indicated. This distinction should not be lost sight of, as the position of the hands on the oar affects not only the character of the stroke, but also the requirements as to the length of the oar and the breadth of the blade. The form of the oars given in the representations of early Egyptian ships is suggestive of paddles used Allowed spoon-blade oars.
Notes.-(1) Since 1893 some curved or spoon-bladed oars have been made at Devonport. (2) There is no record of buttons being used, but on fir oars, which were covered with canvas on the loom, it was sometimes customary to work a 'l'urk's head at the end of the canvas for ornament. (3) As regards sweeps, they used to be made of ash and were 30 ft. long. They were used last in trainmg brigs, but there is no record of them for the last twenty years. sweeps by which the galleys and galleasses were propelled. For these large oars we hear of ash and beech being used as well as pine.
In the Mediterranean the galley propelled by oars long remained the principal type of war vessel. In the Atlantic, and in the northern seas, it was otherwise. The employment of artillery on board ship gradually determined a change in the method of propulsion. The use of sails I9
