Abaci

Studies have shown that kids who master abaci have a better comprehension of math. ❋ Doyle (2008)

Alas, abaci have already been commoditized --you can own your own franchise! ❋ Doyle (2008)

Digital calculators notwithstanding, some abaci can still be found in a grade school classroom or two. ❋ Matt Woolsey (2006)

An early example of a course-of-value recursion was given by Leonardo da Pisa, also called Fibonacci, in his Liber abaci, written in 1202 and revised in 1228, when discussing the famous rabbit problem (paria coniculorum): ❋ Odifreddi, Piergiorgio (2005)

Also in the West, this kind of mathematics came fully to surface only after seven centuries or so, in the famous Liber abaci of Leonardo of Pisa (Fibonacci) around 1200 A.D. ❋ SALOMON BOCHNER (1968)

These abaci, which are finely moulded, are not more than about two and a half inches in depth. ❋ Hubert C. Corlette (N/A)

These rest on triple shafts, with carved caps and rounded abaci. ❋ Herbert Story (N/A)

But the abaci of its capitals run from the jambs across to the buttresses, as is the case with those of the doorway. ❋ Hubert C. Corlette (N/A)

The arcade consists of low massive circular piers, with cushion capitals and plain chamfered abaci, which support semi-circular arches of one order also chamfered. ❋ Joseph E. Bygate (N/A)

The windows have label-moulds over them, and the abaci of the capitals are carried across the buttresses on either side as a string-course. ❋ Hubert C. Corlette (N/A)

The abaci are square and moulded, while the caps proper carry at their angles rudely carved volutes such as occur in the White Tower, London. ❋ Joseph E. Bygate (N/A)

Each of the four sides is pierced by two groups of coupled openings under superior arches, the several moulded members of which rise in four receding orders from the square abaci of the capitals of the angle shafts. ❋ Hubert C. Corlette (N/A)

The transepts are of the transitional style of the end of the twelfth century; the piers which carry the central tower are of the usual transitional type, having graceful capitals and square abaci supporting round arches; on each side of the north transept there are two original clerestory windows, and one of them has angle shafts, with carved caps and mouldings. ❋ Herbert Story (N/A)

It shows, too, in the second bay, the level of the old abaci which ran across from each capital in the window jambs and stopped against the sides of the buttresses. ❋ Hubert C. Corlette (N/A)

Penrose and most writers who followed him supposed the "scamilli impares" to be projections or offsets on the stylobate required on account of the curves to bring the column into relation with the architraves above, and similar offsets of unequal or sloping form were supposed to be required above the abaci of the capitals, but such offsets, although sometimes existing, have no obvious connection with the passage in Vitruvius. ❋ Vitruvius Pollio (N/A)

And in the exterior of the north aisle the same elements of structure and design may be discovered, even to the presence of twelfth-century remains, the curve of the old encircling apse, and the position of the first sills, abaci, and string-courses. ❋ Hubert C. Corlette (N/A)

The windows in the second, third, and fourth bays differ in size and shape from each other; that in the second bay has a pointed arch and no tracery, square abaci and the remains of carved capitals. ❋ Hubert C. Corlette (N/A)

But the angle shafts that carry the arch have carved capitals and square-moulded abaci. ❋ Hubert C. Corlette (N/A)