290 



J. 8. Brown — Relation of Sea Water 



well a mile or two inland could be pumped considerably 

 below mean sea level before the salt water would have 

 head enough to enter it. 



Seasonal variations in salt content. 



Certain wells that are contaminated with sea water 

 exhibit a pronounced variation in salinity. The Peter 

 Beattie dug* well is on a small stratified drift plain about 

 200 feet in diameter at the north end of Narrows Island, 



Fig. 6. 



Fig. 6. — Northern end of Narrows Island, Guilford, Connecticut. A well 

 near the house yielded water with a chloride content that ranged from 83 

 to 609 parts per million in one year. 



(fig*. 6). The well is 12 feet deep, in sand and gravel, and 

 the water level stands at about mean sea level. The 

 results of chloride determinations made from samples 

 collected at different dates, covering almost a year, are 

 given in f^g. 7 and are compared with the rainfall and 

 temperature records. The data show that there was a 

 very great increase of saltiness in the water during June, 

 July, and August, 1919. 



A factor that should not be overlooked in the study of 

 the salinity curve of this well is the quantity of water 



