KEPOBT — 1880. 



Lectures to the Operative Classes. 



1867. Dundee.. 



1868. Norwich 



1869. Exeter .., 



1870. Liverpool . 



1872. Brighton . 



1873. Bradford . 



1874. Belfast.... 



1875. Bristol .... 



1876. Glasgow . 



1877. Plymouth. 



1879. Sheffield . 



1880. Swansea . 



Prof. J. Tyndall, LL.D., F.R.S. 

 Prof. Huxley, LL.D., F.R.S. 

 Prof. Miller, M.D., F.R.S. ... 



Sir John Lubbock, Bart.,M.P. 



F.R.S. 

 W.Spottiswoode,LL.D., 

 C. W. Siemens, D.G.L 

 Prof. Odling, F.R.S... 

 Dr. W. B. Carpenter, F 



' Commander Cameron, 



R.N. 

 W. H. Preece 



'W. E. Ayrton 



!h. Seebohm, F.Z.S 



F.R.S. 

 F.R.S. 



i'.R.S. " 

 C.B., 



Matter and Force. 



A Piece of Chalk. 



Experimental illustrations of the 

 modes of detecting the Composi- 

 tion of the Sun and other Heavenly- 

 Bodies by the Spectrum. 



Savages. 



Sunshine, Sea, and Sky. 



Fuel. 



The Discovery of Oxygen, 



A Piece of Limestone. 



A Journey through Africa. 



Telegraphy and the Telephone. 

 Electricity as a Motive Power. 

 The North- East Passage. 



