Rough brick partition walls in basement, and all chimneys and the backing of all exterior walls, will be laid and thoroughly embedded in Portland cement mortar, 1 part cement to 4 parts sand; and all brick are to be thoroughly drenched before being laid. In backing up stone work, the brick is to be so bonded that it can be brought up approximately level with the top of each stone course; and there is to be placed in every horizontal stone joint a sheet of No. 24 expanded metal, extending to within 1 inch of the face of the stone and through the full thickness of the brick wall. This is to be free from rust, and at once embedded in the mortar joints of stone and brick to form a reinforced concrete bond.

Every fifth course of rough brick is to be of headers.

Where rough brick walls will be exposed to view, the joints will be trowel-pointed and all mortar kept off the face.

At the base of ash-pits, set doors 8 inches by 12 inches.

At the base of chimney flues, set doors 6 inches by 8 inches.

In each fireplace hearth, there is to be a small ash-dump, constructed entirely of cast iron, with cast-iron frames built in and anchored.

Terra-cotta pipe thimbles are to be built in, 1 foot from the finished ceilings, as follows:

1 - 8-inch thimble in Heater Cellar,

1 - 6-inch thimble in Laundry,

1 - 6-inch thimble in Kitchen.

The fireplaces are to be built complete with fire-brick backs and facings, all laid flat, as the chimney is constructed. Special-shaped firebrick, with ends moulded so as to conform to the line of the facing and bevel of the jambs, are to be used at the angles between facing and jambs.

All brick below the flat arch are to be laid in fire clay with close joints; and in each joint a strip of No. 24 expanded metal is to be built, extending within 1/2 inch of the face of the brick and leaving at least 4 inches to build into the mortar joint of" backing. In the throat, put cast-iron flue-stops, with dampers which can easily be closed from below.

The flat arches above are to be laid in Portland cement mortar, with No. 24 expanded metal extending through each joint to within 1/2 inch of exposed faces and sticking up 4 inches. When this is complete, a reinforced concrete beam is to be formed above, in which the brick ties are to be embedded in addition to 6 strands of No. 8 twisted wire fencing.

The flue linings of hard terra-cotta are to be set close; and any which are crooked or broken in handling will be rejected.