Cloud Heights—Kinematic Method

IN NATURE of April i6 (p. 563), and possibly elsewhere, I am made to speak of the method of determining the heights of clouds at sea used by Finemann and myself as the ``aberration method.'' This was a misnomer that I supposed had been corrected. The more proper term is the ``kinematic method,'' since in it we discuss the apparent motions of the clouds considered as the resultant of the true motions of the cloud and the observer. This is the term that I have used since May 1890, and would commend to others.