6 Biographical Memoir of the late Henry Kiihl. 



had taken him through the public museum, and shewn him the 

 collection of natural objects which he possessed, as well as his 

 splendid library, he frankly offered him twice the salary which he 

 had at Groningen, if he would remain at Leyden. What an in- 

 ducement to a young man, inflamed with the desire of know- 

 ledge ! The double salary was less an object of importance with 

 him ; but how great the difference between the Leyden museum 

 and that at Groningen, between the Leyden apparatus and 

 that which the Groningen University at that time possessed ! be- 

 tween Brugman's library and the one at Groningen ! How great 

 the conflict between the love of knowledge, and the desire of dis- 

 charging his duty ! But duty prevailed : " I am too much bound 

 to Swinderen," he replied, " to remain with any other than him, 

 during my stay in Holland." So, in the beginning of September, 

 he returned to Swinderen, like a new gift. He received a gold 

 medal from the faculty of Groningen as the reward of his indus- 

 try, and was admitted by the Physical and Chemical Society in- 

 to the number of its members. 



In the second year which he spent at Groningen, he attended 

 the lectures of Driessen on Chemistry and Botany ; of Bakker 

 and Wilkens on vegetable and human anatomy and physiology ; 

 of Swinderen on the Natural History of Birds, and in this de- 

 partment, of which he was particularly fond, and which he had 

 already assiduously cultivated, he was frequently not merely a 

 hearer, but also an assistant, as Swinderen himself testifies. Be- 

 sides, he turned his attention to the history of exotic plants 

 and animals, as well as to comparative anatomy ; while at the 

 same time he dissected and diligently described the whole of the 

 indigenous birds and fishes, and defined the coloured figures of 

 birds published by Buffbn *. The discoveries which he made 

 in dissecting the various kinds of animals, were afterwards pu- 

 bhshed in the second volume of " Additamenta."" 



During the long vacation of 1818, he made a journey on foot 

 through Germany with his friend Van Hasselt. They left Gro- 

 ningen on the last of June, and already on the third day after 

 their departure had reached Bremen, thirty-six hours' journey 



• Buffonii et Daubentonii Figurarum Avium coloratarum nomina systematica, 

 Groninga;, 1820. 



