On Plaister of Paris. 39 



Queri/ 11. Its duration? 



Answer. In one instance I mowed the same ground 

 four years successively after four bushels per acre of 

 plaister had been applied, but I find that blue grass 

 generally begins to appear the third year ; therefore I 

 wish to mow or pasture the ground two years only, and 

 then plough again. 



Query 12. Is there any difference as to useful effects, 

 between the American and European plaister ? 



Answer. I cannot yet tell. The trials made with the 

 American plaister on barley and clover this spring, 

 mentioned in answer to the tenth query, are my first 

 essays ; the prevalent report of its bad quality, prevent- 

 ed my making an earlier trial. At present the effect of 

 the American plaister appears equal to any thing that 

 might be expected from the European. 



I wish it had been in my power to have given fuller 

 answers to the questions you have been pleased to ask 

 me. In doing it I have confined myself to simple facts, 

 avoiding comments and matters of opinion, supposing 

 them foreign to your design. 



With much respect, 



1 have the honour to be, 

 Dear Sir, 



Your very humble servant, 

 Edward Hand. 

 The Hon. Richard Peters Esq. 



