VUl CONTENTS. 



NUMBER C VI.— SUPPLEMENT TO VOL. XVL 



Page 



Prof. PoggendorfF on Galvanic Circuits composed of two 

 Fluids, and of two Metals not in contact (^concluded) 537 



Prof. J. Henry's Contributions to Electricity and Magnetism. 

 No. IIL On Electro-dynamic Induction (concluded') 551 



Mr. Lubbock on the Heat of Vapours, and on Astronomical 

 Refractions (continued) 562 



Dr. C. Schaf haeutl on the Combinations of Carbon with Sili- 

 con and Iron, and other Metals, forming the different species 

 of Cast Iron, Steel, and Malleable Iron (concluded) 570 



Proceedings of the Royal Society 590 



Index * , 601 



PLATES. 



I. Illustrative of INIr. W. Snow Harris's Second Paper on Lightning Con- 



ductors. 



II. and III. Illustrative of Mr. Griffith's Paper on the Geology of Kil- 



larney. 

 IV. Illustrative of Dr. Roget's Paper on the Problem of the Knight's 



Move at Chess. 

 V. Illustrative of Mr. Lubbock's Memoir on the Heat of Vapours, and 



on Astronomical Refractions. 



VI. Illustrative of Dr. Draper's Paper on the Electro-motive Power 



of Heat. 



VII. Illustrative of Mr. Smee's Paper on the Production of Electrotypes. 



ERRATA. 



Vol. xii. p. 608, line 2 from the bottom,/or Manhand, read Marchand. 



Vol. XV. p. 451, last line but three, /or increasing indefinitely, read in- 

 creasing or diminishing indefinit ely. 



p. 452,Vme li, for cos mi = \/— I. sin mi,read cos mi + ^—l. 



sin m i. 



p. 45.3, line 28,/or p, a, read p, a,. 



-, line 29, for a, read a,. 



p. 454, line 21 , for (23.), read (33.) 



lines 22 and 23,/or e^^, read e ^*. 



Vol. xvi., p. 32, line 15 from the bottom, for 1.2554th, read 1.3554th. 



p. 108 line 19 from the bottom,/or Haller, read Harvey. 



p. 478, line 2, for M.R.S. read M.R.I. 



