366 THE ROYAL INSTITUTION. [CHAP. VI. 



On September 16 he made this note : 'Objects to be 

 attempted during the next week : To-morrow, oxy- 

 muriatic acid pure, to try absorption by two grains of 

 different metals tin, arsenic, antimony, bismuth, 

 copper, platina, lead, zinc.' 



On October 4, when he was about to start for Dublin, 

 he wrote in the Laboratory Book, ' The principal thing, 

 the laboratory in complete order.' He was absent from 

 October 4 to the middle of December. No experiments 

 were entered until October 27 ; then there are some on 

 oxymuriatic acid by E. Davy. 



On November 15 the action of oxymuriatic gas on 

 dried nitrous gas was repeated. 



The next experiment was on November 24. 'Two 

 grains of silver were entirely converted into horn-silver ; 

 the absorption of chlorine gas was of a cubic inch.' 

 This was the first use of the word CHLOKINE in the 

 Note-Book; it occurs daily afterwards. Oxymuriatic 

 gas continued the chief subject of the experiments in 

 the laboratory up to the end of February in the follow- 

 ing year. 



This year Davy was invited to deliver a course of 

 lectures on Electro-Chemical Science, and another 

 course of six lectures on the Application of Chemistry to 

 Agriculture, in the new laboratory of the Dublin 

 Society. Having obtained permission as secretary to 

 be absent from the meetings of the Royal Society, he 

 commenced his course on November 8 and finished it 

 on the 29th, and the Society requested his acceptance 

 of 500 guineas. 



In 1811 he again delivered two courses, one on the 



