55 



these pools consists of but six inches of clay, as the bottoms were of a 

 clayey character. The slopes of tho pools are generally three feet 

 horizontal to one foot vertical. 



AGRICULTURAL DRAINAGE. 



But little Agricultural drainage has been laid during the season. 

 That laid last year has, almost without exception, proved very effica- 

 cious, and is generally in good working order. 



WATER SUPPLIES. 



The water distribution system has been extended by continuing the 

 six inch main around the Lake toward Franklin Avenue, and the 

 twelve inch main in the direction of Fifteenth street. The patent ce- 

 ment pipe is still used, and that which was laid last year is in good 

 condition, and requires no repairs. 



It is proposed to obtain a supply of water for the Park use, or at 

 least a partial supply, from a well. This well has been located on the 

 south side of Lookout Hill, near the Lake, and work was commenced 

 upon it late in the season. It is to be fifty feet inside diameter at the 

 bottom, and forty-five at the top. The walls are to be of brick, two 

 feet thick and bound together rertically by bolts extending from the 

 bottom to the top, at distances of about four feet apart, measured on 

 the circumferance of the circle. After a careful consideration of vari- 

 ous methods for sinking the well, it was decided to build the wall, and 

 then to excavate the material from within, trusting to the weight of 

 the wall to force it down. Sixteen feet in height of the wall was laid 

 securely bolted together, before the excavation was commenced. A 

 derrick with a boom fifty-five in length was set up near the well, so 

 that the sweep of the boom commanded the interior of it. Iron buck- 

 ets containing fourteen cubic feet each were obtained, and a six-horse 

 power hoisting engine purchased. With these appliances the excava- 

 tion was commenced, and carried on with slight interruption until the 

 work was suspended on account of the frost. 



No difficulty was experienced in the lowering of the wall. All that 

 was necessary was to excavate the material from beneath it, and it was 

 carried down by its own weight. Great care was necessary in lowering 

 to keep the excavation under the walls at the same level, so that the 

 wall should settle uniformly. The wall was lowered forty-one feet be- 

 fore the work was suspended, and upon excavating in the center ten 



