I am a horse, and 160 pounds of steam are up to 120 horse-power. I am employed in a f

I am a horse, and 160 pounds of steam are up to 120 horse-power. I am employed in a factory, and I work from morning to night, day, week, and month, year after year, and I have been doing so for a long time of years. I am a high pressure, and a low pressure, and a nominal horse-power, and a horse-power up to 170. I am a single horse, and a hundred horse, and a thousand horse-power. I am a great deal of steam, and I am very easily raised to high pressure. I am very easily down to low pressure. I am easily up to high, and easily down to low, and very easily down to nothing. I am a great deal of power, and I am a