70 NEW YORK STATE MUSEUM 



figures will fairly illustrate this class of implements, though some 

 others may be described. 



Fig. 177 is of a slaty sandstone, and has an unusually deep thick- 

 ened back, the blade being quite thin. The edge has been broken, 

 and this and the grinding required to keep it sharp, have interfered 

 with the perfect curve. It was found west of Cross Lake, and is 

 two and one fourth inches deep by two and seven eighths wide. 

 These thickened backs are comparatively rare. Fig. 178 is quite 

 unique, being of a black and very hard slate, which is very thick in 

 comparison with others. The ends have been broken, and the back 

 is rounded. It comes from the Seneca River, and its present size 

 is three inches wide by one and one eighth deep. 



Fig. 179 has lost about a third of its width which was origin- 

 ally five and one half inches, with a depth of two inches. It is of 

 brown sandstone, with a deep and thick back. This is from the 

 Seneca River. Fig. 180 comes from near Oneida Lake, and has no 

 thickening of the nearly straight back. It is of grey sandstone, 

 and forms nearly a half circle, two and one fourth by six and one 

 eighth inches. A few others may be described. 



One from near the Seneca River is of thin red slate, with a sim- 

 ple back, and is nearly a true half circle, being two by five inches. 

 It is quite sharp and symmetrical. Another, from the Oneida River. 

 is also of red slate, two and one half by six inches. One 

 of dark slate, from Camden, has a less convex edge and an ir- 

 regular back. It is six and one half by two inches. One of red 

 slate, from Oswego County, broken, and now three by five inches, 

 seems to have been originally nine and one fourth by three and one 

 fourth inches. Another, from the same county, and of the same 

 material, has an irregular back, and is six inches wide by one and 

 three quarters deep. A very fine one of red slate, found on the 

 Oneida River, is perfect, and is six and seven eighths by three inches, 

 with a thickness of a quarter of an inch. 



Several come from near Lake Champlain. One of these, of mot- 

 tled slate, is six and one half by two and one eighth inches. A per- 

 fect one of dark slate is six by two inches; and another, which has 

 a thick back, is five inches wide by two and three fourths deep. 



