M. Fournet on the Metamorphk Changes of' Rocks. Ill 



situation, she passed through " a forest" of it in another. This 

 expression, however, may not have been intended to be under- 

 stood literally, and the two situations, for any thing I know to 

 the contrary, may not be far distant. No man is more able to 

 inquire into this than Dr Wight, and therefore?! am confident 

 we shall know the fact before long *. Borneo, Singapoor, and 

 Rangoon, all yield gamboge, and so do probably many other 

 places in the east, as well as Siam. Let us hope that we 

 shall soon get information as to the plant in each which affords 

 it. Mr Malcolmson has obligingly lately given me a specimen, 

 unfortunately only in leaf, from Rangoon, which he found to 

 contain a purgative, yellow gamboge-like juice in its fruit. It 

 is certainly different from my Ceylon specimens. 



When Dr Wight's observations in the Madras Journal were 

 written, he had not heard the discovery which Mr Brown's in- 

 quiries, kindly undertaken at my request, had led to, — that the 

 specimen from which Murray's description of StalagmifAs 

 gambogioides was taken, is a compound, the flowers of Xcm- 

 tJiOGhymus being stuck by sealing-wax upon a branch of what 

 seems my Ceylon plant. The knowledge of this circumstance 

 would have probably modified the observations in the latter 

 part of Dr Wight's paper. 



Account of M. Fournet'' s Opinions regarding J,he Metamorphic 

 Changes of Rocks, and his Observations on the Systems of 

 Elevation in the country near Arbresle {Depart, dit Rhone). 

 Contained in a Report made to the Academy of Sciences of 

 Paris. By MM. Elie de Beaumont, BECiUEKEL, and Alex. 

 Beongniart. 



Concerning the orography of the district of which Arbresle 

 forms as it were the centre, or, in other words, the relief, or 

 various relations of form, elevation, and direction of the hills, 

 valleys, water-courses, &c. M. Fournet has made remarks upon 

 the following principal distributions ; — 



1st, On the parallelism of the principal valleys of the south, 

 the direction also, and the declivity of the lateral valleys, and 



• See additional information on this subject in Scientific Intelligence, 

 Botany. 



