Note 3036 — BOOK XXXI. REMEDIES DERIVED FROM THE AQUATIC PRODUCTIONS.

“Magis refrigerari.” The experiments made by Mariotte, Perrault, the Academy del Cimento, Mariana, and others, showed no perceptible difference in the time of freezing, between boiled and unboiled water; but the former produced ice harder and clearer, the latter ice more full of blisters. In later times, Dr. Black, of Edinburgh, has from his experiments asserted the contrary. “Boiled water,” he says, “becomes ice sooner than unboiled, if the latter be left at perfect rest.” Beckmann’s Hist. Inv. Vol. II. p. 145. Bohn’s Ed.