1875 INTEREST IN GERM-THEORY 185 



for giving the address the hope that when you come to 

 Town you will let my wife and daughters make your 

 acquaintance. 



His continued interest in the germ-theory and the 

 question of the origin of life (Address at the British 

 Association, 1870, see ii. p. 14, sq.), appears from the 

 following : 



4 MARLBOROUGH PLACE, 

 Oct. 15, 1875. 



MY DEAR TYNDALL Will you bring with you to the 

 x to-morrow a little bottle full of fluid containing the 

 bacteria you have found developed in your infusions ? I 

 mean a good characteristic specimen. It will be useful 

 to you, I think, if I determine the forms with my own 

 microscope, and make drawings of them which you can 

 use. Ever yours, T. H. HUXLEY. 



I can't tell you how delighted I was with the 

 experiments. 



Throughout this period, and for some time later, 

 he was in frequent communication with Thomas 

 Spencer Baynes, Professor of Logic and English 

 Literature at St. Andrews University, the editor of 

 the new Encyclopedia Britannica, work upon which 

 was begun at the end of 1873. From the first 

 Huxley was an active helper, both in classifying the 

 biological subjects which ought to be treated of, 

 suggesting the right men to undertake the work, and 

 himself writing several articles, notably that on 

 Evolution. 1 



1 Others were Actinozoa, Amphibia, Animal Kingdom, and 

 Biology. 



