L 67 al 
ticles of commerce and luxury mutt give way to thofe 
of neceflity; and when fo great a quantity of land 
will not be employed in raifing this commodity. 
Ifwe turn to Mr. Davis’s valuable Survey of the 
county of Wilts, we fhall find it there ftated, that 
great as the occafional demands are for barley, it is 
not a crop to be generally depended on. Speaking 
of clays, and of chalky loams, (page 46) Mr. Davis 
remarks, that, ‘‘ In cafe of a wet fowing-time, the 
** crop fcarcely re-produces the feed fown, and the 
** prafs-feeds fown with it come to nothing. That 
“ this is frequently the cafe—and that for this reafon, 
wherever arable fields have been laid in feveralty, 
*¢ the almoft exclufion of barley crops on the ftrong, 
** heavy lands has been the confequence.” 
Again, (in page 76) he gives ftrong reafons againft 
depending on barley as a produétive crop, either on 
the white land, or on a fandy foil; and thefe, amongft 
other reafons, feem to militate forcibly againft ma- 
king it a ftandard for regulating the rents of tithes. 
OATS. 
IF Oats are preper for regulating the rents of 
tithes, it muft be in thofe parts of the kingdom only, 
where they are regularly cultivated, and ufed as one 
of the neceflaries of life. The general demand for 
this article does not, however, arife from the necef- 
_ fities of the people, but from the number of horfes 
_ kept for pleafure, war, and bufinefs. The two firft 
F 2 claffes 
