The average date at which the last killing frost occurs in the spring also determines the limit in latitude or altitude at which the peach can be grown. Even in the favored peach-regions of New York, records bring out the fact that killing frosts must be expected occasionally to destroy the peach-crop and there are few years indeed in which frost does not take heavy toll in the State as a whole. In the twenty-five year period beginning with 1881 and ending with 1905, the peach-crop was destroyed or seriously injured over a large part of New York in thirteen seasons.[256] Little or nothing is done in New York to protect the peach from frosts. Truth is, not much can be done. Whitewashing trees delays blooming time and in some seasons might prevent injury from late frosts but it is too uncertain and too costly to be worth putting in practice. Wind-breaks as often favor the frost as the tree. Smudging is too expensive for the extensive system of peach-orcharding practiced in the East. Failure due to frost may be expected, then, when the commonly recognized precautions in selecting frost-proof sites are not recognized. The limits of peach-culture in New York are also determined by early fall frosts and by the length of the growing season, though both are less important than the winter-climate and late frosts in the spring. The peach-grower must be able to synchronize three of these phases of climate, spring frosts, fall frosts and length of summer season, with the blooming and ripening of peaches,--to do which he must have weather data and the dates of blooming and ripening of varieties of peaches. The necessary data as to the average dates of spring and fall frosts and the length of the growing season can be obtained from the nearest local weather bureau and in the accompanying table the blooming and ripening seasons of 181 varieties of peaches grown at the New York Agricultural Experiment Station are given for the years 1910 to 1914. Blooming and ripening dates vary in the several peach-regions in the State so that to make use of the data from this Station consideration must be given to the latitude, altitude and local environment of the peach-orchard. The latitude of the Smith Astronomical Observatory, a quarter of a mile from the Station orchards, is 42° 52' 46.2"; the altitude of the orchards is from five hundred to five hundred and twenty-five feet above the sea level. The soil is a loamy but rather cold clay; the orchards lie about a mile west of Seneca Lake, a body of water forty miles in length and from one to three and one-half miles in width and more than six hundred feet deep. The lake has frozen over but a few times since the region was settled, over a hundred years ago, and has a very beneficial influence on the adjacent country in lessening the cold of winter and the heat of summer and in preventing early blooming.