WATER 113 



tionable weeds, usually stir up the bottom so that 

 the water becomes muddy. This is also true of 

 goldfish. Mosquitoes in the larva state (wig- 

 glers) are eaten by fish. A lake which is large enough 

 to be stirred by the wind will be free from wigglers 

 except where the water is kept stationary by cat- 

 tails or other water-loving plants. Mosquitoes are 

 sometimes killed by the application of kerosene 

 or other oils to the surface of the water. A lake 

 has so many attractions that one can afford to take 

 some trouble to keep it free from weeds and mos- 

 quitoes. 



To insure "a lake's appearing at its best, the banks 

 should be low at those points of the shore over 

 which the water is most frequently observed (Fig. 23). 

 Thus, borders nearest a veranda or the windows of a 

 house from which the lake is seen should be low so 

 that the surface of the water will be visible its en- 

 tire length in the line of view. On the other hand, 

 banks which are seen meeting the water each side 

 of a view may be steep and high and covered with 

 a high growth. A list of plants suitable for cov- 

 ering the low borders would include Virginia creepers 

 and other vines, violets, marsh marigolds, certain 

 kinds of iris, grass of Parnassus, bluets, forget- 



