1626
THEORY AND PRACTICE OF ENGINEERING.
Book II.
of two severies of the “great scaffolding” were given them for the removal of the whole;and they were to have the uses of all “ gynnes, whels, cables, hobynatts, saws, &c. ; ” theywere to pay for the stone, and to have 100/. for each severy, or 1200/. for the whole, moneybeing advanced for wages as the works proceeded: the “ chare roff,” as the vault is called,was to be sufficiently buttressed, and the whole performed in a perfect manner.
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Fig.3C40.
The extreme width, measured from the face of one buttress to that of the other, is84 feet, and from north to south, from the centre of one pier to that of the other, 24feet; thus the area comprised in a severy, or space between two lines drawn through the centresof the buttresses on the plan, is 2016 feet, exactly double the area of one of the severies ofSt. George’s Chapel, Windsor: the extreme width is the same, but the difference arisesfrom the divisions in the one being double that of the other, as measured from east towest.
Feet.
The area of the nave, 42 x 24 - - - - - 1008
of the chapel on one side - 336
ditto on the other - 336
of the walls on one side - 168
ditto on the other - - * - 168
Hence we have for the areas of the space or void on the plan 1680 feet, and for the wallsand pier 336 feet, or one-sixth of the whole 2016 feet, similar proportions to those which we