Lehigh Portland Cement Co. Allentown, Pa. Lumber Scale. , 1920

Lehigh Portland Cement Co. Allentown, Pa. Lumber Scale. Two wheels within rectangle measuring 6.5 x 12 cm, printed on both sides red and blue on white. Side 1: Lumber scale conversion of feet board measure, square measure, long measure, solid measure. Side 2: Quantity of materials required to make one cubic yard of rammed concrete, mixed in the proportion of 1 sack of cement to cu.ft. of sand, to cu. ft. of stone...Using 1 inch stone and under dust screened out; Using 2 ½ inch stone most small stone screened out, using 2 ½ inch stone and under, dust screened out, Using ¾ inch gravel and under sand screened out BBLS of cement, cu. yds. of sand, cu. yds of stone; Mortar made with coarse sand figured on the end of scale, Mortar made with fine figured on this end of scale.