x LIST OF CHIEF AUTHORITIES. 



By the .kindness of Mr. Wm. Ellis, F.R.S., more recent and 

 convenient values of the magnetic elements arc given : (75) from 

 Brewster and Ency. Mctrop., (76) from Riicker and Thorpe (Phil. 

 Trans. 1890), (77) from the Greenwich observations, (78) from 

 various sources. Neumayer's maps give additional values. 



The results of redeterminations of some atomic weights havn 

 been inserted. The values given by Lunge and Isler (J. S.C.I, ix. 

 501) for the density of dilute hydrogen sulphate have replaced 

 those of Kolb. The thermochemical data have been revised from 

 the resume given by Berthelot (Ann. du Bur. des Long. 1888), 

 and a table of the heat of formation of some cyanides (99 cont.) has 

 been added. 



In the section on physiography data for 1894 have been obtained 

 from the Nautical Almanac for that year. 



S. L. 

 Roundliay, Leeds, 1892. 



