INDEX. 325 



Ploughs, American ; sent to England, trials of them, 



13, 160, 1, 3, 4 



Towsley's ; trial of it, - - - - 165 



Draveil ; improved, and its advantages, - 169 



Ploughing, fall ; its advantages, ... 89, 99, 220 



Potatoes ; apparatus for boiling by steam, 68 



Preston, S. account of stunt in timothy grass, and mode 



of destroying garden grubs, - 189 



periodical freshets in Delaware and N. E. 



branch of Susquehanna, ... 140 



navigation of Susquehanna and Delaware ri- 

 vers, - - - - - 145 



R 



Rake, Horse ; - - 71 



Redman, T. discovery of hop vine repelling insects from 



grape, - - - - -- - 84 



Randolph, Col. description of a hill-side plough, with a 



model, 19 



Ridgeley, N. account of treading and getting out wheat 



by a roller, 29 



Rye, big; or Tangier wheat, cultivation in Maryland, 1,2 



Rye, common ; thrives on newly cleared salt marsh bet- 

 ter than wheat, - 272 



Salt marshes ; reclaiming, improving, and cultivating, 



and general description, 248 to 285, inclusive 

 Sea-shore inhabitants; habits of some, to be taken into 

 the account in calculations of expense of im- 

 proving salt marshes, - 274 

 Say, Thomas; entomological letters, - 224,236 

 Sedge wheat ; insects or worms found in the roots, and 



an account of its mischiefs, - - 213 



Season of 1816; its effects on crops, &c. 95,96, 113, 14, 115, 123, 

 124, 130, 127, 156, 190, 192, 3, 4, 208, 213, 216, 220 

 Shee, Parke ; trapping corn grubs, in holes made by pins 



on the rim of a wheel. - - 202, S 



