of the Hudson River. 9 



The following analyses, I and II in parts per million, were 

 made of water which flowed from the granite through the in- 

 clined holes put down beneath the river. The hole is called -r- — 

 r A 74 



in the official records. By the side of the two for comparison 

 are placed three others, all expressed in parts per million. 

 They are intended to show the contrasts of the deep waters 

 with sea-water and the similarity to other deep waters. 



I . II II IV V 



Bore Bore Eepublic 



hole hole Mine, 



beneath beneath Quincy 1710' 



Hudson Hudson Sea- Mine, below 



Eiver Biver water 47th level surface 



NaCl 5,231 6,607 28,119 29,600 18,510 



KC1 294- 592 



CaCl 2 2,633- 2,013- 179,100 21,800 



MgCI a 380- 277- 3,131 



CaS0 4 316- 354- 1,354 822 



MgS0 4 315' 248- 2,355 381 



MgC0 3 . 1,560 



SiO, 8- 



Si0 2 and residue 113- 1,617 



ALO s ... - .-.. 700 



Fe 2 3 ,Al 3 3 ---- 7- 15- 



Fe 4- 



Cu 9- 



Org. and vol 926- 



Total.. 9,816 9,808 35,664 208,713 45,390 



" CI 5,125 5,619 19,660 132,500 25,360 



" Ca 1,049 816 398 64,500 7,904 



I. Sample taken Aug. 27, 1909, from the deep bore hole, on the 

 east bank. 



II. Sample taken Sept. 1.1, 1909, from the same hole as No. I, 

 but deeper down. On the same day the sample of Hudson River 

 water was taken which is cited above. 



III. Sea water analyzed by Forchhammer, as cited in J. Roth's 

 Allg. und Chem. Geologie, I, 495 



IV. Water from the 47th Level, Quincy Mine, Keweenaw Pt. 

 Dr. G. A. Koenig, anatyst, cited by A. C. Lane, Lake Superior 

 Mining Inst., June, 1908. 



V. Water from the Republic Iron Mine, analyzed by G. 

 Fernekes, cited by A. C. Lane as under IV. 



If we refer back to the analysis of the Hudson River water 

 and compare it with the samples from the bore holes, we see 

 that the latter are much richer in chlorine, and that they are 

 high in calcium chloride, which the river water lacks and 



