Crossword-Solution: FRIGORIFIC 10 letters, 1 clue 🏆 scrabble score: 19

Count Rumford appears to have rightly conjectured that the inhabitants of certain hot countries, who sleep at nights on the tops of their houses, are cooled during this exposure by the radiation of their heat to the sky; or, according to his manner of expression, by receiving frigorific rays from the heavens.

But the frigorific effect of leafy structure is well observed in the deposit of dew and the occurrence of hoarfrost on the foliage of grasses and other small vegetables, and on other objects of similar form and consistence, when the temperature of the air a few feet above has not been brought down to the dew-point, still less to 32 degrees, the degree of cold required to congeal dew to frost.

The objections to its use are that its frigorific power is not sufficiently great to freeze readily; and if it be required to form dessert ices, it is requisite to renew the process, at the expiration of a quarter of an hour, a second time, and, if the weather is very hot, and the water used is rather warm, even a third or fourth time.

After the water was frozen, the vessel was still retained in the frigorific mixture, whilst contact between the tin and platina respectively was made with the extremities of a well-charged voltaic battery, consisting of twenty pairs of four-inch plates, each with double coppers.

Upon substituting balls of snow for heated bodies, they even went so far as to prove that frigorific foci may be formed by way of reflection.