SHUMARD—GEOL. OF STE. GENEVIBVE. 415 
ceptaculite, and Magnesian Limestones, all furnish material of 
more or less value for construction. 
The 2d. Sandstone may likewise be employed for this pur- 
It is also frequently an excellent fire-rock, being well 
d for the hearths and jams of chimneys and hearths 
aces, 
rocks at James’ Mill furnish a m 
Gravel, for roads, occurs ee on the Sa- 
line, Establishment, and Aux Vases, and generally in a suffi- 
ciently comminuted state to be applied at once, without fur- 
ther preparation, to the grades. 
, Sand for manufacture of Glass —The white sand, oceur- 
ing eight miles west of Ste. Geneviéve, has already been 
