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accompanying the Index of the Stratigraphy of North America, 16 only upper Cretaceous and earlier Tertiary are shown, with the exception of a coastal strip of Quaternary, in this part of the Island of Cuba. In the text of this paper (page 643) T. W. Vaughan says: “Strata have been referred to this age (Upper Cretaceous) in the literature on Oriente Province, but as no fossils have been listed there is doubt as to the extent of the area underlain by the Cretaceous in this portion of the island.” No credence, therefore, is placed in Wedding's reference of the limestone to the upper Jurassic. Kemp, and Lindgren and Ross express no opinion on the subject, but Kemp says "fossils would be of extreme interest."

In view of this uncertainty in regard to the age of the limestone, and the interest attaching to its determination on account of its close association with the iron ores, we were quite surprised and highly pleased to find fossils at a small mine known as Barcelona No. 2, which lies & short distance west of the Lola Hill mines. The fossils, which include corals and sponges, were submitted to Dr. T. W. Vaughan, who kindly gave us the following information in regard to them and the age of the rock. The corals belong to the genus Leptophyllia (?), a species of which is found in the Cretaceous of Jamaica. Doctor Vaughan says no similar coral is known in any of the Tertiary of the United States or the West Indies. The sponges are also Mesozoic and probably Cretaceous. The age of the limestone therefore is definitely fixed as Mesozoic and probably Cretaceous.

These fossils are of importance as being apparently the first Mesozoic fossils found in this part of the Island, and more particularly as furnishing the first definite information in regard to the age of the limestone associated with the Firmeza and Daiquiri deposits. It was late in the afternoon when we visited this mine and there was little time for collecting. A more careful search than was possible in the limited time at our disposal would undoubtedly reveal other forms, as well as other localities at which the limestone is fossiliferous, and ultimately make possible a still closer correlation.

16 Bailey Willis: Index to the Stratigraphy of North America. Professional Paper No. 71, U. S. Geological Survey (1912).

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The Water Problem at the Old Dominion Mine. By P. G. Beckett . 679 The Application and Earning Power of Chemistry in the Coal Mining Industry. By Edwin M. Chance

. 711 A Combined Hydraulic and Mechanical Classifier. By M. G. F. Sohnlein. 715 Gold and Silver Deposits of North and South America. By Waldemar Lindgren

. 721 Principles of Natural Gas Leasehold Valuation. By S. S. Wyer. . 747 Industrial Section .

(Interpolated in Advertising Section)

COPYRIGHT, 1916, BY THE AMERICAN INSTITUTE OF MINING ENGINEERS

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Set 11 1940

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BULLETIN OF THE
AMERICAN INSTITUTE OF

MINING ENGINEERS

PUBLISHED MONTHLY

No. 112

APRIL

1916

Published Monthly by the American Institute of Mining Engineers at 212–218 York St., York, Pa., H. A. WIBOTZKEY, Publication Manager. Editorial Office, 29 West 39th St., Now York, N. Y., BRADLEY STOUGHTON, Editor. Cable address, "Aime," Western Union Telograph Codo. Subscription (including postage), $10 per annum; to members of the Institute, publio libraries, educational institutions and technical societies, $5 per annum. Single copies (including postage), $1 cach; to members of the Institute, publio libraries, eto., 50 cents each.

Entered as Second Class mattor January 28, 1914, at the Post Office at

York, Pennsylvania, under the Act of March 3, 1879.

CONSTITUTIONAL AMENDMENT RAISING DUES PASSED

The amendment to Article III, Section 1, of the Constitution, raising the dues from $10 to $12 a year commencing in 1917, which was submitted to the members for letter ballot, was passed by a vote of 1,039 to 401.

MANUSCRIPTS FOR THE ARIZONA MEETING OF THE

INSTITUTE

The next meeting of the Institute, the 113th meeting, will be held in Arizona in the latter part of September, 1916. All papers to be presented at this meeting must be published in the September Bulletin or previously. Manuscripts must, therefore, be in the hands of the Secretary of the Institute not later than July 1. In case manuscripts are given by authors to members of technical committees, or others, they must be in the hands of such persons sufficiently in advance so that they may be actually in the hands of the Secretary of the Institute by the date mentioned.

In the past, the Secretary has received urgent requests for special consideration regarding manuscripts that come in after the closing date. In view of the obvious unfairness of this, the Committee on Papers and Publications has instructed the Secretary not to accept for presentation at the Arizona Meeting any papers received later than July 1, 1916.

iii

PROCEEDINGS OF THE ONE HUNDRED AND TWELFTH

MEETING, NEW YORK CITY, FEBRUARY, 1916

COMMITTEES
Committee on Arrangements
David H. BROWNE, Chairman

BRADLEY STOUGHTON, Vice-Chairman
LAWRENCE ADDICKS

BURR A. ROBINSON
PERCY E. BARBOUR

E. MALTBY SHIPP
GEORGE D. BARRON

JOSEPH STRUTHERS
J. V. N. DORR

E. B. STURGIS
J. R. FINLAY

T. T. READ
Louis D. HUNTOON

R. H. VAIL
Ladies' Committee

MRS. Louis D. HUNTOON, Chairman
MRS. LAWRENCE ADDICKS

Mrs. L. O. KELLOGG
MRS. GEORGE D. BARRON

Miss ELIZABET: H. KUNZ
MRS. David H. BROWNE

Mrs. A. R. LEDOUX
MRS. J. V. N. DORR

MRS. WILLARD S. MORSE
MRS. ARTHUR S. DWIGHT

MRS. HENRY S. MUNROE
MRS. KARL EILERS

MRS. H. A. PROSSER
Mrs. H. W. HARDINGE

MRS. CHARLES F. RAND
MRS. LEVI HOLBROOK

MRS. THOMAS ROBINS
MRS. AXEL 0. IHLSENG

MRS. BURR A. ROBINSON
MRS. W. R. INGALLS

MRS. E. M. SHIPP
MRS. J. H. JANEWAY

MRS. BRADLEY STOUGHTON
MRS. SIDNEY J. JENNINGS

MRS. B. B. THAYER

Finance Committee
G. D. BARRON, Chairman

C. F. KELLEY
ROBERT M. CATLIN

ALBERT R. LEDOUX
W. A. CLARK

W. W. MEIN
KARL EILERS

W. H. Nichols, JR.
JAMES GAYLEY

WILLIAM L. SAUNDERS
Entertainment Committee
Thomas T. READ, Chairman GILBERT RIGG
L. D. HUNTOON

W. B. McKINLAY
LAWRENCE A. ADDICKS

Registration Committee

BURR A. ROBINSON, Chairman
G. A. Roush

L. T. BUELL
College Reunion
JOSEPH STRUTHERS, Chairman

Banquet Committee

E. B. STURGIS, Chairman
N. H. EMMONS, JR.

R. C. PATTERSON, JR.
Luncheon Committee

E. M. SHIPP, Chairman
L. 0. KELLOGG

PHILIP L. GILL
Program Committee

Percy E. BARBOUR, Chairman
BURR A. ROBINSON

H. A. MEGRAW
Public Announcement Committee

R. H. VAIL

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