QQ NEW YORK ZOOLOGICAL SOCIETY. 



immediately started pumping a three-inch stream of water into 

 the head of the Beaver Pond ; and this has continued automatically 

 ever since, save in midwinter. The result is a great improvement 

 in the quality of the water in the Beaver Pond, and the creation of 

 a desirable running brook traversing the lower end of Beaver 

 Valley. 



Water Supply at Bear Dens. — For several years past, the sup- 

 ply of water for cage-washing purposes at the Bear Dens has 

 been very inadequate, due to a feeble source of supply on i82d 

 Street. To remedy this difficulty permanently, a line of two- 

 inch pipe 4(X) feet long was run from the four-inch water main 

 in front of the Reptile House eastward to the Bear Dens, by which 

 there has been secured at the latter point a pressure of forty-five 

 pounds per square inch against thirteen pounds per inch pre- 

 viously. This also gives an increased supply of w'ater at the Res- 

 taurant and Buffalo Corrals. 



Tar Surface on Walks. — Our method of tar-coating the sur- 

 face of walks has been found so successful and satisfactory we 

 have resolved to treat all our macadam walks bv that process. In 

 1905 it was not possible to apply tar to the surface of all the 

 walks that were constructed during that year. The process is 

 necessarily somewhat slow% and can not be hurried with accept- 

 able results. This branch of work was taken up as early as the 

 season would permit and continued throughout the year. To 

 facilitate the work, a surface burner was purchased and used as 

 occasion demanded. During the year 28,000 square feet of walks 

 were surfaced with tar and half-inch stone, and rendered properly 

 smooth, frost-proof, permanently dry, and free from an objection- 

 able quantity of dust. 



With the important thoroughfare known as Osborn's Walk, 

 from which the whole surface of fine screenings had been worn 

 off, leaving the walk unpleasantly rough, a new experiment was 

 tried. The walk was swept free from dust, a coating of hot tar 

 was applied upon the irregular surface, the half-inch stone was 

 applied in a thin coat, and it was saturated with tar. The bond 

 thus made proved quite effective, and the success of this experi- 

 ment will lead to other work of a similar kind. The principal 

 walks re-built, or re-surfaced, were Osborn's Walk, Pheasants' 

 Aviary Walk, and the two walks leading from the west and 

 north to the new^ Boston Road Entrance. 



Near the Service Building a new walk and road combined was 

 built to connect Beaver Valley with the Service Road, at the Rep- 

 tile House. This connecting link is much used by visitors. 



