Boston: Isaiah Thomas and Ebenezer T. Andrews... 1804. [iii-vi] + -240 pages. 12mo., 4 x 7 1/4 inches. Half-sheep and original drab paper boards; lower right front board chipped away; upper right tip worn; spine rubbed; contemporary ownership inscription to title page; lacking free endpapers; leaves browned throughout; a generally sound copy. Last leaf with tear into text (no loss of meaning). Good. Boards. 
Self-styled "Fifteenth edition" with corrections and improvements. First published 1787. "Contents" page at 240. Apparently this book was issued without the usual frontispiece: Cf. Skeel, p. 184. However, the pagination, with the fourth preliminary page numbered vi, is the same as those editions which include the frontispiece. Webster's reader was a constant feature of the American educational landscape during the early 19th century. Many editions. Most copies, like the present example, are found well-thumbed.
Skeel & Carpenter, A Bibliography of the Writings of Noah Webster (1958).