This booklet, prepared and published by the First National
 Bank at Pittsburgh, Pennsylvania, is one of a series issued,
from time to time, since August, 1919, portraying the various
industries of the Pittsburgh district, with the intention of emphasizing
 the importance of Pittsburgh as a commercial and
financial metropolis. A large number of its many industries
and altruistic enterprises, have been described in the booklets,
 of which sixteen have been published, to date. The
following is a list of the subjects discussed, with the date of
issue:

Vol. 1, No. 1—Introductory Booklet... ..August, 1919
Vol. 1, No. 2—Iron and Steel........... September, 1919
Vol. 1, No. 3—Iron and Steel (Part 2)... January, 1920
Vol. 1, No. 4—Coal and Coke. .........June, 1920
Vol. 1, No. 5—Glass.... ........December, 1920
Vol. 1, No. 6—Electrical Appliances. ....March, 1921
Vol. 1, No. 7"—Radium. . . ... August, 1921
Vol. 1, No. 8—Cement and Concrete. . . . December, 1921
Vol. 1, No. 9—Clay Products. ..........December, 1922
Vol. 1, No. 10—Petroleum and Natural
Gas. .......... .December, 1923
Vol. 1, No. 11—Petroleum and Natural
Gas (Part 2)..........December, 1924
Vol. 1, No. 12—Food Products. .........December, 1925
Vol. 1, No. 13—Diversified Products. . . . . April, 1927
Vol. 1, No. 14—Education. .............. April, 1928
Vol. 1, No. 15—Education (Part 2)... ....April, 1928
Vol. 1, No. 16—Hospitals December, 1928