Because the caloric repels the particles of the water.
797. Why does oil float upon the surface of water?
Because, besides being specially lighter than water, the particles of the oil and the water mutually repel each other.
Carbonic acid is a mixture of carbon and oxygen, in the proportion of 3 lbs. of carbon to 8 lbs. of oxygen.
"Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?"