I. Quad. II. Quad. III. Quad. IV. Empty tube 90Ad 180Ad 270Ad 360Ad Full aquot; a 18^ 108Ad _ 198Ad 288Ad Angle of rotation 72Ad 72Ad ... A second observation was now taken with a tube 50 millimetres long, when the following results were obtained : a Quad.
|Title||:||Handbook of the Polariscope and Its Practical Applications|