ECONOMICAL POND CONSTRUCTION 2/ 



three feet deep, and the walls, six inches thick, 

 incline inward at a slight angle. The bottom 

 is four inches thick, and is, like the walls, 

 constructed of broken stone, sand and Port- 

 land cement, the whole having a lining of 

 cement and sand. 



"It being the first of October before the 

 tank was finished, it was allowed to stand 

 over winter, a cover being placed over it to 

 prevent the accumulation of water. In early 

 spring, the bottom was partitioned by boards 

 into four compartments, one foot in depth, 

 which were filled with a rich mixture of well- 

 rotted manure and good soil. In each com- 

 partment a lily root was set, and afterward 

 the earth was covered with a thin layer of 

 sand. The tank was then carefully filled 

 with water from the well. But one filling was 

 necessary and the water has never been 

 changed except by rain and evaporation. A 

 few goldfish were introduced to prevent the 

 breeding of mosquitoes and other obnoxious 

 insects 



"While awaiting developments I cleared 



