For the work on the above, for each superficial foot of fine marble-work seen, of as ordered per samples No. 2 a or No. 3b. and equal to

No. 1 cutting, with 20 curts or curves per inch, fine workmanship, per superficial foot ... 58 cents. No. 1 a, with 4 curts or curves per inch, as per sample No. 2 a, an additional price of 5 cents to the above curt.

No. 1 b, per samples No. 3 b, with 3, or 4, or 5 curt per inch, as ordered, an additional price of 20 cents to the above curt.