HALIFAX WATER WORKS. JOHNSTON. 101 



glazing mentioned will be necessary ; but if the glazing is con- 

 sidered an advantage that all the small pipes ordered be glazed. 



Fortunately, before this letter was received, the order had 

 been placed and the pipes came out coated. These pipes were 

 laid with wood joints. The cost was 5 14s. lOd. per ton, 

 exclusive of freight. 



In 1862 the commissioners of water-supply took up the 

 original 12-inch main and substituted therefor a 24-inch main. 

 These pipes were ordered from Glasgow. The quantity required 

 for the North West Arm valley to be 1 inch thick, tested to 200 

 pounds; and the remainder to be f inches, tested to 150 pounds. 

 All pipes to be 9 feet long and coated with Smith's patent 

 coating. They were laid with wooden joints and cost 4 4s. 3d. 

 per ton, exclusive of freight or duty, or 6 18s., exclusive of 

 truckage. The total cost of laying this main was $54,994.39, 

 or an average cost of $4.00 per lineal foot. The estimated 

 capacity was 5J million gallons when new. There is a 12-inch 

 exit pipe at the Dutch Village Road. On the introduction of 

 the "high 'service " in 1868," the 15-inch main laid in 1856 was 

 used as a part of the supply main and was extended to within 

 1^ miles of Spruce Hill Lakes, this latter distance being laid 

 with 20-inch pipe. These are f inch thick and the 15-inch are 

 f inch. They are 9 feet long and coated with Smith's patent 

 varnish and are laid with wooden joints. That portion of the 

 old 15-inch lying in the valley of the Arm was uncovered 

 and lead joints substituted for the wood. On the 14th January, 

 1869, the commission had a report from their superintendent, 

 complaining that the 15-inch pipes laid the previous year were 

 giving considerable trouble from the fact of the unequal casting, 

 a number of pipes breaking under a pressure of 68 pounds. On 

 examination these pipes were found to be only f inch thick on 

 one side and full J inch on the other, a'nd during the winter the 

 pressure w r as regulated so as not to exceed 45 pounds at Chain 

 Lakes pipe house. The pipes split along the thin side. The 



