I am a power of one hundred and fifty pounds of steam, up to one hundred and sixty po

I am a power of one hundred and fifty pounds of steam, up to one hundred and sixty pounds of pressure, and can be graduated down to forty pounds. I can be employed in a single yacht, or a fleet of steamers, and can be employed in trade or in war. I can be employed in ploughing fields, or in carrying passengers. I can be employed in printing, and in singing. I can be employed in sounding an alarm of fire, and in singing a hymn of praise at a religious service. I can be employed in drawing a carriage, and in drawing a ship. I can be employed in a watch of power, and in a watch of time. I can be employed in a watch of time, and in a watch of time and power combined. I can be employed