129 
in St James's and Hyde Parks . 
sier, who happened to be conversant with entomology, discover 
ed this insect in the dock-yards, and recommended certain pre- 
cautions to be taken for the preservation of the timber there 
lodged. The French Government objected to the expence re- 
quisite for obviating an evil, of which, as yet, they had no ex- 
perience ; and now, when perhaps it is too late, the minister of 
Marine has determined to follow M. de Cerisier’s advice. It 
is from such instances that we perceive the truth of an observa- 
tion made by a French academician, while alluding to the de- 
vastation which such insects may occasion : u L’histoire de ces 
animaux merite d’etre connu, a raison de son extreme import- 
ance, de tons les grands proprietaires et surtout par les inspec- 
teurs o-eneraux de nos forets; elles ont aussi leurs insectes de- 
structeurs, et ils verroient combien de causes qui dans le prin- 
cipe lie fixent au moment fattention peuvent par negligence 
devenir funestes a l’etatf 1 
April 1824. 
Art. XIII. — Analysis of Cinnamon- stone from Ceylon . By 
Dr C. G. Gmelin of Tubingen. Communicated by the 
Author, 
rii 
-1- HE composition of this mineral has afforded a subject of in- 
quiry to Lampadius and Klaproth. The former thought he 
had detected in it a considerable quantity of zirconia and potash ; 
but the analysis was conducted in so defective a manner, and 
the results are so contradictory to the first principles of che- 
mistry, that it is impossible to believe the investigation had been 
conducted by Lampadius himself. Klaproth, whose name will 
never become extinct in chemistry and mineralogy, found the 
following results : Silica, 38.80; Lime, 31.25 ; Alumina, 21.20; 
Oxide of Iron, 6.50; loss, 2.25; ( Beitrdge, vol. v. p. 142.) It 
was proved by this analysis, that Cinnamon-stone is very nearly 
allied in composition to Garnet ; and Professor Mohs has joined 
it to that genus under the name of Prismatic Garnet. Through 
the liberality of Mr Heuland, I obtained a specimen of cinna- 
mon-stone, the genuineness of which is placed beyond all doubt, 
by its possessing all the external characters of that mineral 
VOL. XI. NO. 21. JULY 1824. 
I 
