POPULAR SCIENCE 435 



a deep chocolate-brown colour, and exhibit a well-marked 

 glaze. The edge-flaking, which has given to the stone the 

 well-marked pointed form, is considered to be the result of 

 blows. The specimen, which measures in greatest length 

 (A — B) ill in., greatest width (C — D) 2\ in., greatest thick- 

 ness t£ in., exhibits neither incipient cones of percussion nor 

 striae upon its flaked surfaces, nor does it appear to have been 

 subjected to the action of running water. The original sur- 

 faces of the flint, which are more ancient than the flaking 

 which has produced the present pointed form, show, however, 

 some little amount of abrasion. 



Fig. 4. — Provenance the same as specimen represented in 

 fig. 2. This specimen (fig. 4) has been made from a piece 

 of tabular flint, and its upper and lower surfaces are repre- 

 sented by unflaked cortex. The flaked areas of the specimen 

 are of a chocolate-brown colour. The edge-flaking, which has 

 provided the flint with a more or less straight cutting edge, is 

 considered to be the result of blows. The specimen, which 

 measures in greatest length (A — B) 2§ in., greatest width 

 (C — D) If in., greatest thickness 1 in., exhibits a few incipient 

 cones of percussion upon its flaked surfaces, and some small 

 striae are to be seen upon some of these surfaces. It would 

 appear that the specimen has been subjected to some amount 

 of rolling by water action, as the edges and sharp angles of the 

 stone are somewhat abraded. 



It is, of course, possible that some of this abrasion may 

 have been caused by the slight amount of pressure to which 

 the stone has been subjected, and to which the small striae 

 mentioned bear witness. 



Fig. 5- — Provenance the same as specimens represented in 

 figs. 2 and 4. This specimen (fig. 5) has been made from a 

 piece of tabular flint which exhibits unflaked cortex over 

 nearly the whole of its upper^ surface. The lower surface 

 exhibits the hard unflaked interior of the flint, and is made 

 up of several fracture surfaces which have in all probability 

 been produced by thermal action. The under-surface of the 

 stone is of a chestnut-brown colour, while the upper unflaked 

 surface is of a cafe-au-lait shade. The edge-flaking, which 

 has provided the flint with a more or less straight cutting 

 edge, is considered to be the result of blows. This edge 

 flaking exhibits a well-marked glaze, it is not stained, and 



