1910 P11,118,916
1913 17,227,808
1918 24,507,970
1919 44,735,174
1920 43,759,204
1921 43,529,079
1922 15,208,761
The demand for iron and steel goods in the Philippines is bound
to remain on the ascendant with the daily increase in the use
of structural iron and steel for Government buildings as well as
for private structures. Here again is another vast field awaiting
exploitation by enterprising men and capital.
Manganese.--Manganese deposits are found in Ilocos Norte, Pangasinan,
Bulacan, Tarlac, Masbate, and Benguet. Little, if anything, seems to
have been done in the way of developing them. This mineral product
is of great industrial value and has a sure demand on the world's
market. The United States in 1914 imported 288,306 tons of this
product, and in 1917, 656,088 tons, valued at P21,000,000.
Coal.--No other mineral deposits are as widely scattered in almost
every island of the Archipelago as coal. Extensive deposits which
would warrant investments of capital are found in Cebu, Polillo,
Mindanao, Masbate, and Mindoro. According to estimates made by the
Bureau of Science the probable minimum tonnage of the different grades
of coal found in this country is about 68,000,000 metric tons. Tests
made by the same bureau show the following figures on the comparative
calorific value of imported and local coal: