14 × 22 | 24 | 20 × 36 | 10 | 24 × 52 | 6 | 36 × 36 | 6 14 × 24 | 22 | 20 × 38 | 10 | 24 × 60 | 5 | 36 × 44 | 5 14 × 26 | 20 | 20 × 40 | 9 | 26 × 26 | 11 | 36 × 48 | 4 14 × 36 | 14 | 20 × 52 | 7 | 26 × 28 | 10 | 36 × 54 | 4 14 × 40 | 13 | 22 × 22 | 15 | 26 × 32 | 9 | 36 × 58 | 3 16 × 18 | 25 | 22 × 24 | 14 | 26 × 44 | 6 | 36 × 64 | 3 16 × 20 | 23 | 22 × 26 | 13 | 26 × 52 | 5 | 40 × 60 | 3 ========+======+=========+======+=========+======+=========+===== When stained or art glass is used, the specifications generally limit the cost, as the glass is made according to the architect’s designs or to approved designs submitted by manufacturers. The price depends more on the amount of lead or copper used than on the cost of the glass itself, and therefore no very close estimate can be made. The following figures are only approximate: COST PER SQUARE FOOT Clear glass $1 to $3 Opalescent glass $1 to $3 Plate glass $2 to $4 Cathedral glass $3 to $5 Favrille glass About $8 Ordinary window, or sheet, glass is sold by the box, which contains, as nearly as possible, 50 square feet, whatever the size of the glass may be. There are two qualities of ordinary glass, known as _single_ and _double thick_, the former being about ¹/₁₆ inch thick, and the latter nearly ⅛ inch. Single-thick glass should never be used in panes over 24 in. × 24 in. in size. Table XV gives the number of panes of window glass in one box of 50 square feet. ESTIMATING AND CALCULATING QUANTITIES (PART 2) EXAMPLE IN ESTIMATING =1.= Following the rules and suggestions already given in _Estimating and Calculating Quantities_, Part 1, the estimate for a house will be made as a practical example, the drawings on which it is based being shown in the accompanying plates. In making the estimate, the various portions of the work are taken in the order in which they naturally occur in the erection of the building, following, as closely as possible, the estimating schedule heretofore given. As far as possible, the figures given in the example should be checked up by taking off quantities and performing all the indicated work. It is only by actually making the calculations that any practical benefit from the work will be derived. _No two estimators, working separately, will arrive at exactly the same results; therefore, in following the calculations in this example, some discrepancies between the figures of the person performing the estimating and the ones given will no doubt be found._ These discrepancies should not be important ones, however, and by carefully studying the methods followed, results substantially the same as those computed here should be obtained. EXCAVATION