214 



EXPERIMENT STATION. 



[Jan. 



Table III. — Organic Solids in Bog Waters, 1010. 



[Parts in 100,000.) 



The inorganic solids were more or less influenced by the 

 cement used in the construction of the cylinders. 



The samples of 1911 are best considered in two groujis, one 

 of which represents the hog water in the spring, while the 

 other shows its composition at the end of the summer. The first 

 group consisted of two series of samples which were taken from 

 10 of the bogs on the 10th and 12th of May, before the flood 

 water was drained oif. The samples therefore represented the 

 results of six months of solution, diffusion and precipitation 

 on the organic and inorganic matter in the bogs. One set of 

 samples was filtered through dry paper filters before they were 

 analyzed, while the other set was allowed to stand over night 

 to settle, and then used without filtering. The samples were 

 inky in a])pearaiice when taken and changed but little on stand- 

 ing. Filtration required from twenty-four to forty-eight hours 

 and a change of filter papers, because their surfaces were soon 

 covered with a dark slime which rendered them nearly im- 

 pervious. The filtered water was much lighter in color than 

 the original sample. The material removed by the filters was 

 largely organic in its nature, since the organic solids in the 

 filtered water were lower proportionally than the inorganic 



