A correspondent of the San Francisco Chronicle, says: "I have traveled away from my theme, which was in the beginning the cold wave. Some friends, with myself, were talking about it to a gentleman, long a resident of the State, and its effect upon young orange trees. Some rather remarkable incidents bearing upon this subject were related. Among other things, he stated that it was not the cold or the frost by which the trees were killed, but the heat of the sun closely following it. 'If,' said he, 'any one will take the pains to get up before sunrise and make an incision in every tree, two or three inches long, with a sharp knife, there will be no danger of harm from the heaviest frosts. I had a neighbor, who, going through his grove before sunrise, found his young trees all killed, as he supposed. In a sort of rage he took out his knife and scored the bark of about a dozen or two, to make the destruction sure, but in a few days - lo ! and behold ! - those he had cut came out in renewed life and beauty and were the most vigorous trees in the grove. Acting upon this hint, he always afterward saved his choice trees by an application of the knife before the sun had a chance to get at them after a frost.' I give this for what it is worth, being assured of it as a fact.

It is the newest thing out, and I leave it for gardeners and philosophers to give the reason why".