The orientations of the elastic axes and the optic axes of the albite from Alp Rischuna, which K. Chudoba, H. Fisher, A. Engels etc. had already studied partially (Tab. 2), were tried again to determine by the present writer using an universal stage (Leitz's UT 4) and to know the accuracy of the results obtainable by means of the instrument. The results are given in Tab. 5. The present studies have beeu carried out under the guidance of Prof. S. Kôzu, to whom the writer's hearty thanks are due.