44 SOME MODERN ROCK-BUILDING. 



ces?ive layers of marsh mud, which, in the course of time, en- 

 riched the lake areas with a firm and fruitful soil. The work 

 involved much expense because of the extensive trenches to be 

 dug by hand, but it has been exceedingly profitable. 



The Missiquash Marsh Improvement Co. is engaged in a 

 work of this character in the vaUey of the Missiquash, having 

 got posses.sion of several thousand acres of lake area. This com- 

 pany is applying modern methods, using a steam excavator for 

 the larger ditches. 



Interesting as this process principally is from an economic 

 standpoint, yet interesting it must be to the scientist, aft'ording 

 an example, and perhaps the only one of its kind, of modern 

 rock-building in which man and nature cooperate. 



