LXVIII APPENDIX. 



Of the different Soils referred to in the 

 Appendix;. 



In books on agriculture and gardening much un- 

 certainty and confusion arises from the want of regu- 

 lar definitions of the various soils, to distinquish them 

 specifically by the names generally used: thus the term 

 bog-earth, is almost constantly confounded with peat- 

 moss, and heath-soil ; also the term ' light loam/ 

 c heavy soil/ &c. are given without distinguishing whe- 

 ther that be c light' from sand, or this ' heavy' from 

 clay. In minute experiments, it is doubtless of con- 

 sequence to be as explicit as possible in those parti- 

 culars* The following short descriptions of such 

 soils as are mentioned in the details of the experiment 

 are here given for the above purpose. 



1st. By c loam' is meant any of the earths com- 

 bined with decayed animal, or vegetable matter. 



2nd. * Clayey-loam' when the greatest propor- 

 tion is clay. 



3rd. * Sandy- loam' when the greatest proportion 

 is sand. 



* In the experiments made on the guantity of nutritive matter in the grasses, 

 tut at the time the seed was ripe, the seeds were always separated: and the calcu- 

 lations for nutritive matter, as is evident from the details, made for grass and 

 not hay. 



