286 



NOTES OX GEOLOGICAL RESULTS. 



The length of this outlet a as, as nearly as can be made 

 out, about forty feet, and it was in a horizontal position, 

 which may be at right angles to its first position. 



Professor Bonney, writing of the microscopic characters 

 of this rock, says : " The rock consists of quartz, felspar and 

 black mica. The quartz contains a fair number of cavities in 

 many of which are small bubbles, often moving ; but some are 

 empty, others are dark as if stained," Of another specimen 

 he says : " fluid cavities abundant." 



We have therefore a granite with indications of fluid 

 infiltrations, and it seems to me fairlv certain that water 

 found its way down into this rock while it was in a hot 

 condition, possibly from the nearness of volcanic action. 



The specimen will remain in the museum. 



SPECIMENS EXHIBITED. 



Felsite from Bon Repos. — Potash felspar. 



Felsite from Corbiere. — Soda felspar. 



Felsite (Quartz) from Talbot Road. 



Eurite from L'Islet (Romains). — Potash felspar. 



Quartz (Vein) from Grantez. 



Diorite (Quartz) from L'Islet (Romains). — Quartz diorite with 

 Mica (Protite). 



Diorite Hornblende from Hougue Recard. — Felspar and Horn- 

 blende. 



Diorite Hornblende from Capelles. — Felspar and Hornblende. 

 Diorite Hornblende from Vaupot. — Felspar and Hornblende. 

 Diorite Hornblende from Grande Maison. — Felspar and Horn- 

 blende. 



Diorite Hornblende from Bon Repos. — Long grain. 

 Greenstone, Hornblende-dolerite, from Les Tielles. 

 Greenstone, Olivine-dolerite, from Les Tielles. 

 Greenstone, Olivine-dolerite, from Bon Repos. 

 Porphyrite from Bon Repos. 

 Granite from Mont Cuet. — Protite. 

 Granite from Vaugrat. 

 Syenite from Vaugrat. 



