This section is from the book "The Law Of Contracts", by William Herbert Page. Also available from Amazon: Commercial Contracts: A Practical Guide to Deals, Contracts, Agreements and Promises.
The cinder foundation for sidewalks shall be eight (8) inches in thickness. On this foundation shall be laid a three (3) inch layer of concrete of Class II. The wearing surface shall consist of a one (1) inch layer of mortar composed of two (2) parts Portland cement and three (3) parts sand. The materials and workmanship throughout shall conform to the City's Standard Specifications for "Cement Walks."