152 BULLETIN OF THE 



twenty feet, and none of the wells were started at a greater height than 

 forty-two feet above high-water mark. 



Palace yard artesian well : — 

 72 ft. of coral rock. 

 6 ft. of lava. 



Then 260 ft. lava to coral, thickness not given. 

 Then clay. 

 Then lava to 706 ft. 



A second well half a mile inland from the above : — 

 30 ft. of boulders. 



Coral was reached at 200 ft., of a thickness of 30 ft. 

 Then 250 ft. of clay. 



At Waimea, Oahu, 900 ft. was drilled through hard ringing coral 

 rock ; then sand and lava were encountered. 



Near Pearl River Lagoon, close to the road running above the ele- 

 vated coral rock plateau to the southeast of the Pearl Lochs, a well 

 passed through 300 to 400 ft. of coral rock. 



Another well passed through 



100 ft. of soil and boulders. 30 ft. of coral. 



100 ft. of coral. • 90 ft. of clay. 



12 ft. of clay. 28 ft. of sand and boulders. 



A well in Thomas Square : — 



6 ft. of soil. 60 ft. of clay. 



10 ft. of sand. 50 ft. of coral. 



200 ft. of coral. 80 ft. of clay. 



44 ft. of clay. 50 ft. hard pan. 

 10 ft. of coral. 



Another well, after a few feet of surface soil, came upon a bed of 

 38 ft. of coral. 5 ft. of clay. 



Then 22 ft. of white sand. 45 ft. of coral. 



43 ft. of yellow sand. 30 ft. of clay. 



47 ft. of lava. 100 ft. of coral. 



110 ft. of coral. 78 ft. of clay and coral mixed. 



100 ft. of lava. 28 ft. of clay. 



70 ft. of coral. 120 ft. of lava. 



The " coral " in these wells was so ground up that it could only be 

 recognized as such from the larger fragments, and the so-called clay was 

 mainly lava detritus finely pulverized. 



