352 COX, REIBLING, AND REYES. 
irregular demand.” A steady demand of 3 tons per day would 
probably lower the price to not more than 25 per cent in excess 
of the average cost in the United States or Hurope. An estimate 
of 16 pesos per ton for good quicklime is reasonably high. 
According to the above estimates the maximum cost of manu- 
facturing 20,000 sand-lime bricks daily and selling expenses 
would be as follows: ; 
Item. Pesos. 
Interest on investment at 8 per cent (300 
working days per year) 21.32 
Foreman (American or European), 8.00 
Engineer (Filipino), 4.00 
Fireman (Filipino), 2.00 
Laborers (Filipinos), 18, at 90 centavos, 16.20 
Sand, 46 m® (70 tons), at 97 centavos, 44,62 
Lime, 6 tons, at 16 pesos, 96.00 
Coal, 8 tons, at 10 pesos, 30.00 
Oil and waste 4.00 
Wear and tear 10.00 
Total 236.14 
Selling expenses at 10 per cent 23.62 
Cost of manufacturing 20,000 bricks 259.76 
Cost of manufacturing 1,000 bricks 13.00 
This estimated cost of 18 pesos per thousand 9-inch face 
bricks is based on liberal operating expenses. Good management 
and the installation of limekilns ought to reduce the cost below 
11 pesos, and a further saving of raw materials would result 
from the manufacture of hollow bricks and building blocks. 
However, even a cost of 13 pesos per thousand is reasonably 
cheap when compared with the local price of other materials 
of the same class. Concrete construction work is expensive. 
At the water front, cement costs from 4.50 to 5.50 pesos per 
barrel; gravel, 1.80 to 2.20; sand, 0.98 to 1.20; and crushed 
stone, 2.70 to 3.50 pesos per cubic meter. Prepared cement and 
clay products are even more expensive, as shown by the following 
prices furnished by the Bureau of Supply under date of August 
14, 1912. 
The value of lime imported into the Philippine Islands during the 
years 1907 to 1911 averaged only 920 pesos annually. When imported from 
foreign countries it is subjected to a customs tariff of 8 centavos per 100 
kilograms. 
