288 Scientific Intelligence, 
shaped like a spear-head, at about eighteen inches from the face of the 
pit, and sixteen from the surface of the ground. Mr. Flower in this com- 
munication pointed out evidences to prove that this and many other simi- 
Jar flint-implements obtained from the same gravel were really the result 
of human manufacture, at a time previous to the deposition of the gravel 
in its present place. Mr. Fowler’s visit to St-Acheul was made in com- 
pany with Messrs. Prestwich, Godwin Austen, and Mylne, with a view to 
verify the discoveries made respecting the occurrence of flint-implements 
in the gravel and peat of the Somme Valley by M. Boucher de Perthes, 
of Amiens. 
_6. On Professor C. Piazzi Smyth’s supposed proofs of the Subma- 
ones % 
publication in the Philosophical Transactions of my paper on the Lavas 
of Mount Etna,* a Report by Prof. Smyth, Her Majesty’s Astronomer for 
Scotland, has been printed by the Admiralty of Great Britain, “On the 
Teneriffe Astronomical Experiment of 1856,” in which a chapter on 
geology and “ volcanic theories” is introduced. 
This chapter, which did not form part of the original report as pub- 
sari 
When I first read these passages, I naturally concluded that some new 
ed 
having never seen or heard of such a fact myself when in the island, 
On the Structure of Lavas which have consolidated on steep slopes; with Re- 
1 the Mode of origin of Mount Etna, and on the Theory of Craters of Ele- 
t Charles Lyell, Phil. Trans. part 2, 1858, p. 703. 
