28 
On the Soil in which the Cinchona thrives. 
[Jan. 
A further application of system may be introduced, by classifying* the geographi- 
cal localities in one direction, and the mineral species at right angles thereto, on the 
shelves. Thus, supposing one cabinet to comprehend the Himmalayan collection, 
along the top shelf should appear the names of the places, from the West to the East } 
while on the descending shelves under them, should be arranged, successively, Gra- 
nite, Gneiss, Slates, Sandstone in the order in which they are themselves found on 
descending from the summits of the mountains to the plains on the South. Of 
course, such an arrangement could not be made perfectly to represent facts ; but 
study Uld grCatly aSSiSt ^ imaginati ° n and the rnem °ry in the pursuit of geological 
A , cablnet > capable of holding 360 specimens open to view, and as many more in 
the drawers, constructed on the principles above advocated, is submitted this evening 
for the inspection of the Physical Class. 
IX— On the Soil in which the Cinchona thrives. By H. Piddiiigton, Esq. 
[Read before the Physical Class of the Asiatic Society.] 
In camming a collection of minerals from Peru, which had been sent to our wor- 
thy Vice-Prestdent, I found the following label to one of the specimens 
No 76 Pndra que se encruutra en las margenes de Guallaza, Cerro de Su 
Cristobal, legna y media de N h S., de altura consider-dhl^ t Q , , , o ae an. 
tiene un solo arbol de Quina y la opuesta esta cubeirta : si cria en estac!^ 7 
pndra que esta Cubeirta eon oft. del mismo arbol con un espesura de *,1827^ 
4 Translation. 
and a half fromR Cristoval, a league 
single bark tree, (Cinchona) and the opposite side is cl Sl ° pe has not a 
grow m this sort of rock, which is covered with their l ^ Wlth them * ^ 
quarters of a yard.” 011 eaves » to the depth of three 
Looking to the probability that this valuablA tmn 
of culture, both in India and Australia Der ha ma y one day become an article 
bable, that an analysis of the rock mio-ht with^ m Europe » 11 appeared pro- 
ciety's records. ^ WUh propriet y> occupy a space in the So - 
It proved to be, upon examination, a decomnno* 
tenor of which was friable, while the interior 7 / granular ionite, the ex- 
l°° grainS were found to consist of wat7r 4 1 v 2 o g ipaC l ’ 
Siliceous matter, with some trace of vege- 7 
table matter, (from the outside,) “ } 
Carbonate of lime, J 
Ditto of magnesia, 
Loss, 
0,62 
46.00 
51.00 
0,32 
100,00 
In a mineralogical point of view it is 
“ far eXCeeds that found in t r* able that the Proportion of ca, 
vabiabk „ T e T ! bUt * is ■ ^ EUTO ^’ "•»-» « 
