All lime to be best quality Rockland or its equal, freshly burned; and all cement equal to first quality Rosendale. Brands to be approved by Architect. All sand to be clean and sharp. Portland cement, first quality, equal to Alpha.

Mortar

Except where otherwise specified, proportions to be:

Lime mortar - One part lime to three parts sand.

Lime-Rosendale cement mortar, or "half-cement" mortar - One part Rosendale cement, 1 part lime, 5 parts sand.

Lime-Portland cement mortar - One part Portland cement, 2 parts lime, 4 parts sand.

Rosendale cement mortar - One part Rosendale cement to 2 of sand.

Portland cement mortar - One part Portland cement to 2 of sand.