'An account of a Book intitled: Christiani Ludovici Gersten Tentamina Systematis novi ad mutationes Barometri ex natura elateris aereii demonstrandas... ' Concerning theories about changes in the weather and the rise and fall of mercury - first part contains the new theory of the propagation of vibrations along a series of continguous elastic bodies (figure in text) - second part applies this thoery to the solution of the chief appearances of the baroscope - last part explains the states of constitutions of the air and the weather connected with them Read to the Royal Society on 7 December 1732 1732