Notice of Prof. De Candolle. 225 



himself have solved, but feeling that he had laid out more work 

 than the longest life could suflice to execute, and anxious to com- 

 plete the Prodromus, he frankly imparts his plans, his doubts, and 

 his suspicions, hoping that younger and less busy laborers would 

 clear up the one and complete the other. 



He more than once intimates his intention of following the 

 publication of the Physiology with other works which should 

 cover the whole ground he had gone over in his lectures. In the 

 preface to the Physiology, he gives the titles of those which he 

 intended, if time and health and will should serve, to send forth, 

 to fill up the great plan he had laid down. To complete the 

 fundamental portions, in addition to the two works he had al- 

 ready published, he proposed to himself methodology, which 

 should deduce from the study of the organs, the principles and 

 methods of classification. For the principles on which this was 

 to be executed he refers us to the '' Elementary Theory ;" for the 

 conclusions, to the Prodromus. 



Among the accessory branches of the science, he includes, 



1. Botanical Geography, which, from the two preceding, infers 

 the laws or general facts relative to the distribution of plants on 

 the surface of the earth ;* 



2. Oryctological Botany, which would comprehend the history 

 of fossil vegetables, considered in their relations both to the strata 

 of the earth and to the forms of recent plants ; 



3. Historical Botany, exhibiting the steps by which botany 

 has arrived at its present state.f 



Among the practical parts, he reckons, 



1. Agricultural Botany, the application of the principles of the 

 preceding to the culture of vegetables, on which he had twice 

 given a course of lectures ; 



2. Medical Botany, their application to medicine ; on which 

 subject he apparently meant to enlarge the work already men- 

 tioned, upon the medical properties of plants ; 



* On this subject he had published, in 1809, the article " Botanical and Agri- 

 cultural Botany," in the Dictionnaire d'Agriculture, and in 1820, the article "Bo- 

 tanical Geography," in the Dictionnaire des Sciences Naturelles, besides the in- 

 troduction to the second volume of Flore Fran^aise, explaining the botanical map 

 of France. 



t The article Phytography, in the Dictionnaire Classique d'Histoire Naturelle, 

 contains an outline of this portion, extracted from his lectures upon the subject. 



Vol. xLii, No. 2.— Jan.-March, 1842. 29 



