Permanent power of steam up to 100 lbs. of pressure to the square inch of horse power

Permanent power of steam up to 100 lbs. of pressure to the square inch of horse power, is 60 lbs. of iron. The power of horses to the same amount of permanent iron, is 46 lbs. of iron. The power of horses to 60 lbs. of iron, up to 25 lbs. of steam, is 70 lbs. of iron. The power of horses to 60 lbs. of iron, up to 60 lbs. of steam, is 46 lbs. of iron. The power of horses to 60 lbs. of iron, up to 100 lbs. of steam, is 46 lbs. of iron. The power of horses to 60 lbs. of iron, up to 170 lbs. of steam, is 46