EXAMINATION OF WATERS OF GREAT SALT LAKE. 

 The observations made are recorded in the following table : 



245 



*Much over 1.031, the highest reading on salinometers used. 



On the line returning from the promontory to Bear River the density 

 fell from 1.01G5 at the promontory to 1.0015 half a mile east-northeast. 

 The entire area of Bear River Bay north of this point, as determined 

 by the investigation, is practically fresh. The fresh water apparently 

 extends farther south near the promontory than on the eastern shore, 

 this being accounted for by the western sweep of the main discharge 

 from the river. 



At the mouth of the Jordan the full breadth of the "neutral zone" 

 was not ascertained, as a boat was not available for making the obser- 

 vations. The following is the record: 



Station. 



Location. 



No. 1 Off east mouth of river 



2 300 yards from No. 1 



3 450 yards from No. 1 



4 j 550 yards from No. 1 



g f650 yards from No. 1 



\Sanie place 5 minutes later . 



It was evident from the last reading and from the change observed 

 in the color of the water that the salinity increased rapidly from station 

 5 lakeward. It is probably an overestimate to state the width of the 

 zone of water having the salinity 1.010 to 1.020 as 250 to 300 yards. 



In the cases of the Jordan and the Weber, the distances were esti- 

 mated by ijacing; in Bear River Bay they were based upon distance 

 per stroke traveled by the boat, and checked by reference to the topog- 

 raphy of "The Knoll" on the promontory. 



The eft'ects of the general narrowness of the neutral zone and its 

 erratic movement under the influence of the several agents discussed 

 are important in their relation to oyster culture. A narrow body of 

 water of a density between 1.010 and 1.020 could be utilized if its posi- 

 tion were fixed, or the middle of a wide zone could be used if its maxi- 

 mum oscillation were less than half its width, as in this case the middle 

 belt would not be encroached upon by water either too salt or too fresh. 

 Unfortunately, however, the amplitude of the oscillations is too wide 

 for the maintenance of this condition, as was proved in the case of 



