CONTENTS. 



LECTURE I. 



On the Study of Natural History and the Sciences. 



Page 



On the Study of Natural History . . . 1 



Astronomy . . . 16 



Pneumatics - . . 19 



Hydrography . . .20 



Chemistry . . .22 



Mineralogy . 26 



Geology . . .32 



, Botany . . .38 



L- Zoology . . .44 



Concluding Remarks . . .47 



LECTURE II. 



On Vegetable Physiology. 



Definition of a vegetable . . . .52 



Distinction between vegetables and animals. . . 53 



General structure of vegetables . 56 

 The root ...... 57 



The external bark, or epidermis . . . . , 59 



The true bark, or cutis . . . 60 



The albernum, or sap wood . . .62 



The leaves . . . ' . ,64 



Functions of the leaves . . . 6& 



The flower . . . 71 



Process of re-production . . .75 



