﻿BOTANICAL GAZETTE 



[MAY 



south of the town of Maltby. It has an area of some 60 acres. 

 Mud Lake is situated on the west side of Lake Washington, just 

 north of the city limits of Seattle. It is separated from Lake 

 Washington by a narrow wave-built ridge of gravel. South Mud 

 Lake bog is a small patch of sphagnum situated within the southern 

 portion of the lake. North Mud Lake is larger (perhaps 15 acres 

 in area) and lies adjacent to the north and west sides of the 

 lake. 



For comparison, the lowering of the freezing point of the waters 

 from some lakes and springs was determined. The results are 

 shown in table II. 



Crystal Lake is located in the center of Maltby bog. It is 

 entirely surrounded by sphagnum, and has, at least at the surface, 

 no contact with other soil. The lake has an area of about 10 acres. 

 The water from this lake is scarcely distinguishable in appearance 

 from that of the bog. The location of Mud Lake has already been 

 given. Its water resembles bog water somewhat and contrasts 

 strongly with the clear water of Lake Washington. Samples 3 

 and 7 were collected from Lake Washington at a point near Mud 

 Lake. Spring no. 1 is just north of the city limits of Seattle. It 

 is near East 65th Stfeet and 40th Avenue N.E. It is in logged-off 

 land which is not under cultivation. Spring no. 2 is at the head 

 of a ravine on an unused portion of the campus of the University 

 of Washington. It is situated in logged-off land. 



The difference between the freezing point of pure water and that 

 of solutions resulting from the decay of rhizomes of Nymphaea 

 polysepala was also determined with the Beckman apparatus. The 



