SCIENTIFIC PROCEEDINGS— core^mwerV. 



16. A Vibrating-Flame Eectifier for High-Tension Currents. By John J. Dowling, 



M.A., F.INST. p., and J. T. Harris, b.sc. (February, 1921.) 6d. 



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



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

 1921.) 6d. 



18. A Direct Reading Ultra-Micrometer. By John J. Downing, 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. 6d. 



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



(March, 1921). Is. 



DVHLIN : HRINTRK AT THE UNIVEHSITV PKF.SS BY FUNSONHV AND GIBBS, 



