38 A STATISTICAL ACCOUNT OF THE 



colour you please) to make the paint thick as can be well 

 brushed on. As you brush on the paint, have your com- 

 position ready to sift, or dash on. It is thus made. — 



Take one bushel of ground plaister, calcined over a 

 fire in a dry pot, or kettle. When cold, mix with it 5 

 bushels of stone dust or fine sand, dry^ and the more^nY- 

 ty or siliceous, the better. Sift or dash on, as fast as the 

 paint is laid on. When dry, the second coat is applied 

 in the same manner. Live coals, in quantities, have been 

 thrown on roofs thus coated, without injury. It does 

 not scale with frost, or melt with the hottest sun. The 

 above is sufficient for a large roof. 



The whole expence of the preceding composition in- 

 cluding labour and laying on will not exceed % 50. 



Feet. In. 



Length of the bridge, - 550 



Abutments and wing walls, - 750 

 Total length, - - - 1300 



Span of small arches - 150 

 (three in the whole number, 

 including middle arch.) 



*Ditto of middle arch, - 194 10 



* The middle arch was originally intended to be only 

 160 feet, but the dam could not be placed on the spot contem- 

 plated, owing to the bareness and inequalities of the rock at 

 the bottom. 



It is highly creditable to those concerned in the direc- 

 tion and executive branches of this work, that no delay ever 

 occurred through want of supplies, or prompt payment. Yet 

 one million and an half of feet (board measure) of timber, and 

 above 22000 perches of stone, with all the subordinate and 



