Ths construction of the framework of the Japanese roof is such that thc weights all act vertically; there is no thrust on the outer walls and every available point of the interior is used as a means of support.
It was specially divided into (1/5)th, the foot of (3/5)ths being as important as the cubit.
In Greece it is the most usual unit, occurring in the Propylaea at Athens 12.44, temple at Aegina 12.40, Miletus 12.51, the Olympic course 12.62, &c. (18); thirteen buildings giving an average of 12.45, mean variation .06 (25), = (3/5)ths of 20.75, m.
There is, however, fair evidence for units of 17.30 and 1.730 or (1/12) of 20.76 in Persian buildings (25) and the same is found in Asia Minor as 17.25 or (5/6)ths of 20.70.
On the Egyptian cubits a small cubit is marked as about 17 in., which may well be this unit, as (5/6)ths of 20.6 is 17.2; and, as these marks are placed before the 23rd digit or 17.0, they cannot refer to 6 palms, or 17.7, which is the 24th digit, though they are usually attributed to that (33).
Oppert (24) concludes from inscriptions that there was in Assyria a royal cubit (7/6)ths of the U cubit, or 25.20; and four monuments show (25) a cubit averaging 25.28.
Apparently the same unit is found (18) at Heraclea in Lucania, 21.86; and, as the general foot of the South Italians, or Oscan foot (18), best defined by the 100 feet square being (3/10)ths of the jugerum, and therefore = 10.80 or half of 21.60.
By the theory (18) of 2 metretes = cube of the 18.67 cubit from the 12.45 foot, the cotyle would be about 25.4, within 0.4; but then such a cubit is unknown among measures, and not likely to be formed, as 12.4 is (3/5)ths of 20.6.
Therefore 16.6; metretes = (37/20)ths of 12.16 cubed, .
The size of jar commonly known as a quart size may have a capacity from 4 o 0 th to s 00 oth of a microfarad, and if charged to 20,000 volts stores up energy from a quarter to half a joule or from -ths to Iths of a foot-pound.
There are other arrangements of bars giving straight-line motions, and these arrangements together with ths general properties of mechanisms of this kind are discussed in How to Draw a Straight Line by A.
The best rippler, or apparatus for separating the seed capsules from the branches, consists of a kind of comb having, set in a wooden frame, iron teeth made of round-rod iron i ths of an inch asunder at the bottom, and half an inch at the top, and 18 in.