Bsuens Ge Queries on Plaister of Paris, by Mr. Edward 
Duffield, of Lower Dublin Township, stig: 
County. 
Dear Sir, 
I received your favor of July 20th, 1796, containing | 
a number of queries respecting plaister of Paris, viz. 
Query 1. How long have you used the plaister of 
Paris ? 
Answer. Every year since 1783. 
Query 2. In what condition was your land kd 
you began the use of it ? 
Answer. It was under timothy grass rather poor, but 
was improved with three bushels to an acre the first 
year, the next year it was better, the third year about 
equal to the first, the fourth year I repeated the plais- 
ter at four bushels to an acre, when it was very good, 
at least two and an half tuns from an acre, and continu- 
ed so several years, This lot hath been plaistered five 
times since 1783, and is yet good. 
Query 3. What quantity per acre have you enerals 
ly used ? 
Answer. From three to five bushels, according to 
the soil; if sandy three bushels; and more if loamy. 
Query 4. What soils are the most Lea for this 
manure 2? 
Answer. Sandy or light loam. 
Query 5. Have you repeated the application of it 
with or without ploughing—at what intervals, and with 
what effect ? 
