We learn from the best authority, that sales of pears have been actually made at Philadelphia this season at prices calculated to give an impetus to their culturo beyond any former example. One remarkable specimen of Duchess d'Angouleme pear was sold at Isaac Newton's Fruit and Ice Cream store, in Chestnut street, Philadelphia, for One Dollar ! and many specimens not quite so large, but very respectable in size, produced seventy-five cents each as soon as they were displayed in the window. Now this is very encouraging, certainly, to a man who can purchase a tree for from twenty-five to fifty cents, and sell the produce at even half or quarter the above prices. In addition, we are assurred that Mr. Newton was selling a stock of Vicar of Winkfield pears, on December 2, 1852, at seventy-five cents a dozen, to eager buyers! Our correspondent says he immediately sat down and ordered pear trees for all the vacant spots he could find in his garden. We only add that we think him a sensible man.