56 



THE 8ALTON SEA. 



laboratory. I give this table only, rather than the tabulated record of all the observa- 

 tions since the beginning, for the following reasons: (1) increasing skill in collecting and 

 observing makes these later records the most complete; (2) they show the same fluctua- 

 tions in population, color, etc., coincident with the changing densities of the brines, as 

 appear in all the records; (3) they show the range of concentrations during the year, from 

 that at which the salt crystallizes, down to the minimum, and up again to the formation 

 of salt once more. 



Table 22. — Record of living contents of samples of brine taken from six salterns. 



Tank No. 1. 



