PROCEEDINGS OP 



THE EOYAL SOCIETY. 



VOL. XXI. 



No. 146. 



CONTENTS. 



PAGE 



June 19, 1873 (continued). 

 XVI. On a Standard Yoltaic Battery. By Latimer Clark, C.E 422 



XVII. t Note on High-Power Definition as illustrated by a compressed Podura- 



scale. By E. B. Beaumont, F.R.S., and Dr. Royston-Pigott, F.R.S. 422 



XVIII. On the Accommodation of Vision, and the Anatomy of the Ciliary Body. 



By Arthur Trehern Norton, F.R.C.S., Lecturer on Anatomy at 

 St. Mary's Medical School 423 



XIX. On Mr. Spottiswoode's Contact Problems. By W. K. ClipeorD, M.A., 

 Professor of Applied Mathematics and Mechanics in University College, 

 London , . 425 



XX. Observations on the Functions of the Ganglia which are formed in the 



Posterior Eoots of the Spinal Nerves. By Eobert Lee, M.D., F.R.S. 426 



XXI. Researches in Circular Solar Spectra, applied to test Residuary Aberra- 

 tion in Microscopes and Telescopes, and the construction of a Compen- 

 sating Eyepiece, being a sequel to the paper on a Searcher for Aplanatic 

 Images. By G-. West Royston-Pigott, M.A., M.D. Cantab., Memb. 

 Roy. Coll. Phys., Fellow of the Camb. Phil. Soc, the Royal Ast. 

 Society, &c, and late Fellow of St. Peter's Coll., Cambridge . . . 426 



[For continuation of Contents see page of Wrapper."] 



