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holes, their height and width half a hole. Two other 
slips are fixed for attaching the windlass, three holes long 
and half a hole wide. The thickness of a slip is called 
camillum, or according to others the dove-tailed box, and 
is of the dimension of one hole, its height half a hole. 
The length of the windlass is eight holes and an eighth. 
The roller nine holes wide. The length of the epitoxis 
is three quarters of a hole, and its thickness one quarter. 
The chelo or manucla is three holes long, its length and 
thickness three quarters of a hole. The length of the 
bottom of the channel sixteen holes, its width and thick- 
ness each three quarters of a hole. The small column 
(columella) with its base near the ground eight holes, the 
breadth of the plinth in which the small column is fixed 
three quarters of a hole, its thickness three twelfths. 
The length of the small column up to the tenon twelve 
holes ; three quarters of a hole wide, and five-sixths of a 
hole thick. The three braces are nine holes long, half a 
hole wide, and a sixth of a hole thick; the length of the 
tenon one hole. The length of the head of the small co- 
lumn is one hole and three quarters. The width of the 
fore-piece (antefixa) is three eighths of a hole, its thick- 
ness one hole. The smaller back column, which in Greek 
is called «vrißavie, is eight holes long, one hole and a 
half wide, and three twelfths of a hole thick. The base 
(subjectio) is twelve holes, and its breadth and thickness 
the same as that of the smaller column. The chelonium 
or pillow as it is called, over the smaller column, two 
holes and a half; also two holes and a half high, and 
one hole and three quarters wide. The mortices (car¬ 
chesia) in the axles are two holes and a half; their thick- 
ness also two holes and a half, and their width one hole