38 Durable and Harris — Galveston Deep Well. 



all crystallize in prisms, while all the bromides and the chloride 

 containing caesium crystallize in plates. A number of other 

 double halides of this types are known, especially among the 

 mercuric compounds. Herty has evidently prepared a potas- 

 sium-lead double halide of the 1:2 type containing bromine 

 and iodine, although he interprets his results in an entirely dif- 

 ferent way. In a recent article* he describes some tabular 

 crystals of an olive-green color which he has selected and 

 analyzed with evident care and skill. He gives the following 

 analyses of three separate products : 



above 





Pb I 





Br 



K 



p. 95, D 



44*89 17-61 





32-59 



4-56 = 99-65 



p. 95, E 



45-42 14-94 





34-72 



4-50 = 99-58 



p. 104, 



43-87 22-20 





29-03 



4-43 = 99-53 



The followin 



g ratios may 



be 



derived 



from the al 



analyses : 













Pb. : 





I + Br 



K 



p. 95, D 



2- 





5-01 



1-07 



p. 95, E 



2- 





5'15 



1-08 



p. 104, 



2- 





5'08 



1-08 



The ratio required for the formula KPb 2 (Br,I) B is Pb : 1 + 

 Br : K — 2 : 5 : 1 and the agreement is so close that there can be 

 no doubt that this is the formula. Although no pure iodide 

 of this type has been produced, it is interesting to notice that 

 Herty's compound shows that the potassium salt is capable of 

 existence when mixed with a relatively large amount of the 

 bromide. 



Sheffield Scientific School, March, 1893. 



Aet. Y. — The Galveston Deep Well; by E. T. Dumble 

 and G. D. Habeis. 



The Section— E. T. Dumble. 



The City of Galveston, Texas, desiring to secure fresh water 

 on the island, if possible, rather than go to the mainland for it, 

 and having failed to do so at moderate depths, decided to sink 

 a well to the depth of three thousand feet unless suitable 

 water was found before going so far. I therefore detailed Mr. 

 J. A. Singley to watch the boring and to secure all the infor- 

 mation possible from it. 



Work began in April, 1891, and continued with various 

 interruptions and delays until August, 1892. The method used 



*Am. Chem. Jour., xv, pp. 94, 95, 97-99, 103, 104 (Feb. 1893) 



