Vol. Li. P. 176.] Professor Busch, of Bonn, authorises me to fly the country. [Illustration: BÉLA KÚN IN KASSA „ 116 EUGENE SZANTO _alias_ SCHREIBER „ 122 BÉLA KÚN GIVES AN ADDRESS TO STUDENTS. VIII. SCIENTIFIC USE OF SPECTACLES. [Illustration: FIG. 166.] [Illustration: FIG. 109.] We must direct particular attention Dr. Draper's experiments, the rise of temperature, the pieces.