92 Correspondence—Mr. W. 8. Gresley —Dr. Irving. 
3000 FEET OF QUATERNARY AND ? TERTIARY DEPOSITS IN 
TEXAS, U.S.A. 
Srr,—At Galveston, Texas, a well has recently been bored (in 
search of water for a city supply) in which the following formations 
are reported (in the New York ‘Engineering and Mining Journal’’) 
to occur. This well is said to be the deepest on the sea-coast of the 
United States. 
From surface to AOE sogs00 Grey sand. 
Thence toa depth of 64 ,, ...... Red clay and shells. 
: sos KOO: iss uence Blue clay, sea shells, and rotten wood. 
5 SON vg) eee Sands and sea shells. 
ae Sa een eens Sand and clay. 
an 288) Ore: as Sand, clay, sea shells, and decayed wood. 
55 SOMO 55.0 Sonsen Varying strata of sand, clay, and large logs. 
At very bottom of hole a bed of Sea shells was struck. 
The diameter of the hole varied from 15 to 6 inches. 
No water and no rock were encountered. 
Perhaps this may meet the eye of someone who can supply more 
detailed information in regard to this interesting section, and say 
something as to the nature of the sea shells, fossil wood, etc., 
brought up. 
Ents, Pa., U.S.A., 6th December, 1892. W. S. Gresrey. 
“THE MALVERN CRYSTALLINES.” 
Sir,—May I be allowed to make one or two brief remarks on 
the criticism of my friend, Dr. Calloway, in this month’s number 
of the Grou. Maa. 
While attaching a very high value to his work, [ still fancy I 
have broken new ground to some extent by presenting the case of 
the. Malvern Crystallines as a physical problem to be attacked, first 
of all in the light of the field-evidence, for observing and collecting 
which I had exceptional opportunities in the early part of the year. 
I may say that his general omission from consideration of the 
chemical and physical factors of such a problem takes the sting out 
of many of Dr. Calloway’s criticisms. JI cannot regard it as a 
valid criticism to quote from what is little more than a note in 
Prof. Phillips’ later work, as if it neutralized the value of the 
speculations of his earlier work, to which I referred. It does not 
alter my estimate of the value of his earlier views, which went so 
far in anticipation of some recent advances in petrological science. 
Does Dr. Calloway think he is appealing from Phillips’ drunk to 
Phillips’ sober ? Nor does a negative deduction from Dr. Callaway’s 
general experience of the Malverns do much to damage a case 
specifically cited by me in the quarry above West Malvern Church. 
Creditably again is so variable a factor with different minds, that 
such a retreat from the objective to the subjective does not appear 
to me to be of a very high order of scientific reasoning. The 
puzzling case of the hornblende and the two felspars mentioned on 
p: 046 seems to me (so far as J can follow the description) to admit 
of an easy explanation as a case of pure and simple segregation as 
crystallization progressed in the mass, if the variable fluxing-action 
