MR. P. O. PEDERSEN ON THE SURFACE-TENSION OF LIQUIDS 



proposed by K. PRYTZ* and based on the optical contact between a microscope and ;i 

 reflecting surface. It is possible in this manner to determine the diameter of a circular 



B 



20cm. 



Fig. 4. 



JH, 



\ 



jet with great exactness, but with not circular jets the "method, unfortunately, becomes 

 impracticable. 



* PRYTZ, 'Overs. Videnek. Selsk. Forh.,' p. 17, 1905: 'Ann. d. Phys.,' 10, p. 733, 1905. 



