A correspondent says: " You have made a mistake on page 114 in naming P. Banksiana as one of the trees in the mountains above Denver. P. contorta, or rather P. Murrayana looks very much like P. Banksiana which does not grow in Colorado. P. Murrayana grows up in Montana in countless thousands on burned land, but it does not grow in the Black Hills in Dakota, neither does P. Banksiana, which runs out in Minjjesota 200 miles above St. Paul".

[Writing Pinus Banksiana, was wholly a slip of the editorial pen, as of course P. contorta was intended. It is a good illustration of how long a first impression will endure. When the editor first visited Colorado years ago, his first impression of the young pine trees was, that he saw P. Banksiana. Though he learned better after finding trees with cones, yet we see here that first impression slipping unconsciously from the pen after lying dormant fifteen years. - Ed. G. M].