128 LIFE AND EXPERIENCES CHAP. 



4, MARLBOROUGH PLACE, N.W. 

 June 7, 1878. 



MY DEAR ROSCOE, 



I had not begun to think about the title of my preachment 

 November being a long way off. 



If you think that Harvey and the Discovery of the Circula- 

 tion of the Blood would do, it would suit me excellently 

 well. 



I suppose my auditors will not be likely to have read the 

 Fortnightly and find out that I am giving them an old story. 



The advantage of the subject is that one can make it 

 interesting and deal with it in a speech more than a lecture. 

 With your big audiences this is a great practical advantage. 



Ever yours, very sincerely, 



T. H. HUXLEY. 



Most of the lectures were given in the Hulme Town 

 Hall, but some were delivered in the large Free Trade 

 Hall, which was always crammed. They were attended 

 by thousands of people of all sorts and conditions, and 

 as published they have been sold for a penny all over 

 the world. They have also served as models for 

 popular but truly scientific lectures delivered in other 

 cities and other countries. Many of these I started, 

 especially those in Glasgow, when in 1879 I gave a 

 lecture on the " Chemical Action of Light" to the 

 Glasgow Science Lectures Association. 



In the course of the years which have passed since 

 those lectures were given, I have frequently met 

 persons, some of them occupying a high and respon- 

 sible position in commerce and industry, who informed 

 me that they were indebted to these lectures for their 

 first interest in science, and have added that their 

 whole subsequent career was altered and influenced 

 by attending them. One of these was Mr. Thomas 

 Parker, of whom the following notice appeared in the 

 Westminster Gazette of February 4th, 1893 : 



