Speaking of the probable success of pine-apple culture in Florida, the Dispatch says:

"There is no such thing as the 'frost line,' or the line of 'hurtful frosts; ' all frosts are hurtful, but the degree of hurt depends upon the severity of the frost. It is probable that no part of our national domain is absolutely exempt from frost, but for all practicable purposes that part of Florida lying south of a line from Cape Romano to Jupiter Inlet may be regarded as strictly tropical.

"At periods more or less remote from each other a polar wave of such extreme severity sweeps over the country that its icy breath reaches the southern limits of our State, but woe to the rest of mankind when the real South Florida gets a frost. How remote these periods have been or may be no one can tell. One interval only has fallen within the memory of man, and that was fifty one years ago.

" But absolute exemption from frost is not necessary to successful pine-apple culture. South of 280 on the Atlantic coast and 270 on the Gulf coast I believe a pine-apple crop is in no more danger from frost than the corn crop of Ohio or the wheat crop of West Virginia and East Tennessee".