INDEX. 



P 



Peters, Richaid, on gypsum, . , - - 156,310 

 on thickness, cement and materials 



of walls, - - - 197 



on orchards, - - - - 211 

 on coarse flour, brown bread, and the 



force of habit,as it relates to esculents, 227 

 on new herbs and shrubs appearing, 



after firing woods, - - - 237 



on trench ploughing, - - 240 



on hemlock, for live fences, - 249 



remarks on, and plan of, a stercorary, 281 

 on changes of timber and plants. Races 



of animals extinct, . . . 296 

 on gypsum, whether it is found in the 



United States ? . . . . 310 



Pise walls, remarks on, _ . _ . 205 

 Pits and dung holes prevent fermentation. Receptacles 



for muck under stables and barns censured, 1 53 

 Planting, shallow, best for fruit trees, - - - 212 

 Plants, tendency in nature to change them in succes- 

 sions on the same soil, - - - 27 to 46 

 Plashing hedges, mode of, with a cut, appendix, - 25-6 

 Plough, coulter, described, - - - 91 

 shovel, described, - - - - 98 

 three furrow, described, - - - 237 

 Ploughing, new mode of, described, - - . §7 

 oiten, deep and at proper times recommended, 100 

 in fresh dung improper for wheat, - 284 

 trench. Facts, relating to it, and descrip- 

 tion of, - - . 240-1-2-3-4-5-6 

 Prison of Philadelphia, remarks on, - - 199 

 Pruning, Bucknal's mode as to branches and roots, 216 

 Pummice press, a new one described, - - 109 

 Pyrites, fertilizing effects of, when burnt, on grass 



Appendix, 33 



