The Experiment in Which Clouds and Wind and the Colors of the Rainbow can be Produced in Glasses

Abstract

It is a known fact that air expands through heat and contracts through cold. We have learned this in particular from thermoscopes or thermometers which were invented about thirty years ago. From the rarefaction and condensation of air enclosed within them, the variations in heat and cold can be examined from day to day and hour to hour. Because many others have written about this, so as to save the reader time and for the sake of brevity, we shall refer him to the Reverent Father Kaspar Schott’s Mechanica Hydraulico-Pheumatica page 229 and other writers mentioned therein. Likewise see our invention below in Chapter 37.