SCIENTIFIC PROCEEDINGS— cow^mwe^. 



16. A Vibrating-Flame Rectifier for High-Tension Currents. By John J. Bowling, 



M.A., r.iNST.p., and J. T. Harris, b.sc. (February, 1921.) Gd. 



17. A Sensitive Valve Method for the Measurement of Capacity, with some 



Important Applications. By John J. Bowling, m.a., p.inst.p. (February, 

 1921.) 6d. 



18. A Birect Reading Ultra-Micrometer. By John J. Bowling, m.a., m.r.i.a., 



F.iNST.p. (March, 1921.) 6d. 



19. Studies in the Physiography and Glacial Geology of Southern Patagonia. By 



E. G. Fenton. (Plates V, VI, and VII.) (March, 1921.) 4s. Gd. 



20. Award of the Boyle Medal to George H. Pethybridge, b.sc, ph.d., 1921. 



(March, 1921). Is. 



UUHLIN : PRINTED AT THE UNIVERSITY PRESS BY hONSONBY AND OIHKS. 



