Investigation of the powers of the prismatic colours to heat and illuminate objects, &c. Experiments on the refrangibility of the invisible rays of the sun. Experiments on the solar, and on the terrestrial rays that occasion heat, &c. By William Herschel, LL.D. F.R.S. Being a series of papers read at the Royal Society, and published in The philosophical transactions. - Herschel, William, (Printed by W. Bulmer and Co. Russel-Court, Cleveland-Row, St. James's,, 1800)