TWENTIETH ANNUAL REPORT 87 



Vii-inch flat iron, 100 feet 3-inch by -"'s-inch flat iron, all being fas- 

 tened together with "'s-inch machine bolts. Several trials by 

 the elephants have conclusively proven that the fence is now 

 sufficiently strong to withstand any attacks. The cost of this im- 

 provement was $1,100. 



Wild Fowl Pond. — The recurring epidemics among the birds 

 of the Wild Fowl Pond have indicated for some time the neces- 

 sity of supplying a sanitary bottom, but the appropriation of 

 $3,000 for this purpose hung fire so long a time that it was not 

 possible to do more than the excavating of about 200 cubic yards 

 of soft mud, and the partial underpaving of about 60 per cent 

 of the area that is to be concreted. About 1,000 cubic yards of 

 fill and stone were used. As soon as the weather will permit 

 the work will be completed, and the muddy portion of the pond 

 will have a smooth, clean bottom of concrete. 



Neiu Animal Hospital. — The drain from the hospital was 

 connected with the main sewer by means of about 150 feet of 

 6-inch vitrified pipe. 



IMPROVEMENT AND REPAIR FUND, 1915. 



Walk Repairs. — The walk repairs was again the largest 

 item performed from this fund, there being resurfaced over 

 95,000 square feet of walks and roads, the main walks being: 

 Pheasant Aviary Walk, Mountain Sheep Walk, Beaver Valley 

 Walk, Service Road for its entire length with the exception of 

 a stretch of about 300 feet, Crotona Entrance Plaza and walk, 

 and the Boston Road Entrance Plaza. At the Concourse about 

 2,000 square feet of concrete sidewalk was laid, and a great deal 

 of the brick taken up and relaid upon a concrete foundation. 

 The total expenditure for walk repairs was $4,025. 



Heating Repairs. — The heating repairs consisted of the in- 

 stallation of a new hot-water supply boiler and additional radia- 

 tion at the Administration Building, the installation of a steam 

 heating plant at the dwelling at Nursery, and the resetting of 

 two boilers at the Large Bird House, and one at the Rocking 

 Stone Restaurant. In addition to that a great many minor 

 repairs to pipes, valves, etc., were done, and a number of new 

 flues supplied. The expenditure for this work was $1,100. 



Flying Cage. — Repairs to and recovering of the Flying Cage 

 which had been begun last fall, were carried on during the win- 

 ter and early spring whenever weather conditions permitted. 



