JOUENAL OF 



THE TRANSACTIONS 



OP 



M;(|:, ^ ^' 



OR, 



General Secretary : Lecture Secretary : 



E. J. SEWELL. E. WALTER MAUNDER, F.R.A.S. 



VOL. XLIX 



LONDON: 



(Pufili^l^flf ijy tt)c iEii^tttutr, 1, Central %\\imx\^i, mt^Umw^UXy ^.TO. 1.) 



ALL 



EIGHTS 



R K B E K V E D. 



