Mathematical Tracts On Physical Astronomy, The Figure Of The Earth, Precession And Nutation, And The Calculus Of Variations is a book written by George Biddell Airy in 1826. The book is a collection of mathematical tracts that explore various topics related to physical astronomy, including the figure of the Earth, precession and nutation, and the calculus of variations. The first part of the book focuses on the figure of the Earth, including discussions...