Erratum.
The last two lines of note 7 in the report "Ballistics of Dwarf Mistletoe Seeds," by F. G. Hawksworth [Science 130, 504 (28 Aug. 1959)], should read ". . . due to gravity, In is the natural logarithm, and V(o) is the initial velocity" rather than ". . . due to gravity, and In is the natural logarithm of V(o), the initial velocity."