1803. Re-vii'zu of Br Huntcy'^s Gcor^ical EJJliys. 207 



'^xhich fall at different heights over the fame f pot of ground. This 

 is an ingenious dillertation, but cannot be fcparated. 



2. O71 the culture of potatoes. The author thinks flable dung 

 and mofs are the beft manures for this efculent, and details the 

 experiments made by him, to afcertain the point, in a diftind: 

 manner. The perulal of this paper afFordjd u-. much fatis- 

 fa6lion. 



3. On the analogy hctween plants and animals. The vegetable 

 world is certainly a very palTive one, yet, in many inftances, the 

 laws which govern it muit be allowed to be analogous to thofe 

 maintained through the animal world. The brawny oak gra- 

 dually decays like mortal man. Hoary old age tumbles both 

 into ruins, even though the axe be withheld from the one, and 

 difeafe from the other. Vegetables enjoy fleep as well as the 

 animal world, and the amputation of a plant retards its growth, 

 and fpoils its fymmetry, in as great a degree, as if the operation 

 had been performed on an animal fubje6t. 



4. This eflay is devoted to experiments and lliort pieces of 

 pra£lical information tranfmitted to Dr H. As the experiments 

 prefented bear the mark of authenticity and corred:nefs, we re- 

 commend them to the ferious confideration of the public. 



5. On the mofl prof table ??iethod of managing light arahlc 

 lands. It is the Norfolk fyftem of four crops which is here re- 

 commended ; but we believe many farmers in that county have 

 felt a neceffity for extending the rotation, in order that a greater 

 variety might be introduced ; and we think they have acted 

 rightly. 



6. On the fexes of plants. We have received much fatisfac- 

 tion from this ingenious eilay, and lament that it is not in our 

 power at this time to prefent the whole of it to our readers. 

 The true fource of mildew, may here be difcovered j at leail the 

 theory is ingenious and plaufible. 



7. On a cheap and expeditious method of drai?iing land. Cheap 

 cures are feldom the moll elieclual, and in the draining of land 

 we have uniformlj'- found, that a penny hained was not a penny 

 gained. The value of labour and materials is now fo much en- 

 hanced, that drains, of the fize mentioned, could not be linifhed 

 completely at double the expence here {lated. 



8. On top drefjtn;j[s. This paper is from Mr Young, and con- 

 tains much calculation and abundance of figures. The beft con- 

 ducted experiment may be defeated by a ihower of rain falling 

 at a time when a critical part of the procefs is in hand ; hence 

 inferences from the refult ought to be viewed with a fceptlcal 

 eye, till confirmed by repeated trials under fimilar circum- 

 llances. * 



9. Q?i the Scotch fir. The fineft fir-trees of Scotland are to 



X2 be 



