22 DAVID LIVINGSTONE. [chap. ii. 



by two young men on a new principle, under Mr. Young's 

 instructions, became an object of great attraction, and 

 among those who came to see it and its effects were 

 two sons of the Professor of Mathematics in the Uni- 

 versity. Although but boys, both were fired at this 

 interview with enthusiasm for electric science. Both 

 have been for many years Professors in the University of 

 Glasgow. The elder, Professor James Thomson, is well 

 known for his useful inventions and ingenious papers 

 on many branches of science. The younger, Sir William 

 Thomson, ranks over the world as prince of electricians, 

 and second to no living man in scientific reputation. 



Dr. Graham's assistant devoted himself to practical 

 chemistry, and made for himself a brilliant name by the 

 purification of petroleum, adapting it for use in private 

 houses, and by the manufacture of paraffin and paraffin- 

 oil. Few men have made the art to which they devoted 

 themselves more subservient to the use of man than he 

 whom Livingstone first knew as Graham's assistant, and 

 afterwards used to call playfully " Sir Paraffin." " I 

 have been obliged to knight him," he used to say, " to 

 distinguish him from the other Young." The "other" 

 Young was Mr. E. D. Young of the Search Expedition, 

 and subsequently the very successful leader of the Scotch 

 Mission at Lake Nyassa. The assistant to Dr. Graham 

 still survives, and is well known as Mr. Young of Kelly, 

 LL.D. and F.E.S. 



When Livingstone returned from his first journey, 

 his acquaintance with Mr. Young was resumed, and their 

 friendship continued through life. It is no slight testi- 

 mony from one who knew him so long and so intimately, 

 that, in his judgment, Livingstone was the best man 

 he ever knew, had more than any other man of true 

 filial trust in God, more of the spirit of Christ, more of 

 integrity, purity, and simplicity of character, and of self- 

 denying love for his fellow-men. Livingstone named 



