xxxviii BIOGRAPHICAL INTRODUCTION 



before them the recent determinations of nitrogen in the 

 experimental soils at Rothamsted. A tour of nearly ' three 

 months was afterwards made in the United States. In 1884 

 he was again at Montreal, at the meeting of the British 

 Association, and afterwards made a second extensive tour 

 through North America. The last visit was paid in 1893, 

 after the celebration of the Rothamsted jubilee, for the 

 purpose of delivering a course of lectures on the Rothamsted 

 experiments, in accordance with a provision of Sir John Lawes' 

 trust deed. Sir Henry Gilbert first attended the Agricultural 

 Congress held in connection with the World's Fair at Chicago ; 

 here he had a splendid reception, all present rising and 

 cheering for some time. To this Exhibition at Chicago a large 

 collection of diagrams had been sent from Rothamsted, and 

 for these a medal was afterwards awarded. Sir Henry Gilbert 

 then gave a course of seven lectures at the State Agricultural 

 College at Amherst, Mass., taking as his subject the chief 

 results relating to the crops ordinarily grown in rotation, with 

 those relating to the feeding of animals, obtained at Rothamsted 

 during the previous fifty years. These lectures, in an enlarged 

 form, were afterwards published by the United States Depart- 

 ment of Agriculture, and were reprinted, with an introductory 

 account of the Rothamsted Experiments, in the Transactions 

 of the Highland and Agricultural Society of Scotland for 

 1895. 



In 1884 Dr Gilbert was elected Sibthorpian Professor of 

 Rural Economy in the University of Oxford, and held this 

 office for six years, the full term allowed by the statute. He 

 delivered during this time over seventy lectures on the results 

 of the Rothamsted investigations ; these lectures he hoped to 

 publish, but the intention has remained unfulfilled. 



In 1885 Dr Gilbert became an Honorary Professor of the 

 Royal Agricultural College at Cirencester, and delivered an 

 annual lecture during six years ; the lectures were published in 

 the Agricultural Students' Gazette. They treat in a condensed 

 form of some of the subjects previously discussed at Oxford. 



