C P9 1 



(td: in which are confidered their fpecific ufes in 

 the general economy. 



Our author has illuftrated his fubjed, by addu- 

 cing numerous examples from all parts of the Fe- 

 getable and Animal kingdom, to fhew how ad- 

 mirably the whole is ordained, to contribute to 

 the generation, nutrition, and due proportion 

 of each, in the grand fcheme of nature and 

 providence. 



103. Theses Medico. J, C. D. Schreher, iy6o* 



In this diflertation. Dr. Schreber delivers a brief 

 view of the Linn^an dodlrine, relating to the ana- 

 tomy and phyfiology of plants, in which he endea- 

 vours to fuftain the following thefes :— That all 

 plants confift of a medullary and cortical fubftance ; 

 in the former of which is manifefled the life of the 

 plant, and through which it is perpetuated, either 

 by feeds or buds, which are confidered as the ulti- 

 mate extenfion of this part. The cortical part is 

 confidered as the organ of nutrition to the whole. 

 —That, as in a number of certain fpecies of 

 plants, which in artificial fyftems form a genus^ we 

 fee a fimilar proportion and agreement of the parts 

 of frudification, howfoever different the external 

 form of the whole plant-, and as we not unfrequent- 

 ly fee hybrid plants produced, he therefore pxopofes 

 it as a matter worthy of fpeculation, whether, ori- 

 ginally, all the fpecies have not been produced in 

 the fame way, by the various admixtures of the 

 farina. From this power in the medullary part, 

 of perpetuatipg itfelf, and modifying the whole 

 5 internal 



