MATTER 277 



Tait, p. G. — Properties of Matter (especially chaps, i.-v.). Edinburgh, 



1885. 

 Thomson, Sir William (Lord Kelvin). — Popular Lectures and 



Addresses, vol. i. (especially pp. 142-52). London, 1889. 

 A popular account of Larmor's gyrostatic ether and also of the ether- 

 squirt will be found in a lecture, " Over Ether-Theorieen," given by W. H. 

 Julius in 1899 before the Netherlands Natur. en Geneeskundig Congres, and 

 published in its Proceedings. 



