﻿of mercury. The data are put into such form that they may be 

 compared with the data given by Livingston (5) for bog waters 

 of central and eastern United States. 2 



Duplicate series of determinations of the freezing point lowering 

 were made for each sample reported in table I. Owing to the low 

 concentrations of the solutions, the maximum or freezing-point 

 temperatures remained surprisingly constant, and were read at one- 

 minute intervals from 6 to 10 times. The deviation from the mean 

 in each series was usually about o?ooi, seldom as high as o?oo2, the 

 estimated reading error of the thermometer. The means of the 

 two series agreed with each other in all cases within o?ooi, and in 

 four cases they were identical. A hand lens (aplanatic triplet) was 

 used in reading the scale, and care was taken to avoid parallax. 

 The temperature of the outer bath in all of the tests except 3 was 

 between 3?5 C. and 3?8 C. In the three exceptions the tempera- 

 tures were 3?4, 4?o, and 4?5 C. 



Samples 1-8 inclusive were obtained during the rainy season 

 or soon after its close. Each sample was obtained by cutting out 

 the sphagnum to a depth of 30-45 cm. and dipping up the water 

 that collected. Samples 9-12 were obtained just at the close of 

 the dry season. Samples 9 and 11 were obtained by squeezing the 

 water from handfuls of sphagnum obtained at 50-200 mm. below 

 the surface of the bog. This method was used because at that 

 time no water accumulated in a hole 1.5m. deep in half an hour. 

 Samples 10 and 12 were dipped up from holes cut in the sphagnum 

 40 cm. deep. In both of the Mud Lake bogs the height of the 

 water table is evidently determined by the level of the adjoining 

 lake. There is no lake adjoining either the Fauntleroy bog or the 

 Henry bog. 



The general characteristics of the sphagnum bogs of the Puget 

 Sound region and of the Alaska coast have been described by 

 Rigg (7, 8). Descriptions of the Henry bog, the Fauntleroy bog, 

 and the Cordova bog are included in the papers cited. Maltby 

 bog is situated in Snohomish County, Washington, about a mile 



