'440 Count Le Maisireh Memoir on [Dec. 



No VII 



Account of the Christians of the Church of Our Lady of Hope 



at Bombay. 



Men .". 1472 



VV omen ~2<,0 



3752" 



Deaths. 



1801 187 



1802 :.... 185 



1803 218 



1804 233 



1805 151 



1806 138 



1807 147 



1808 132 



1809 168 



1810 158 



1717 or annually 156 

 Births 1801 to 1811, 985, or 88 annually. 



Article VI. 



A Memoir on some new Combinations of Prussic Acid. 

 By his Excellency the Count Le Maistre, of St. Petersburgh. 



Ferruginous prussic acid, when assisted by heat, combines 

 with different substances, which, while cold, do not exhibit any 

 affinity for it ; and all these combinations are blue, like prussiate 

 of iron. Copper itself, whose dark carmine red prussiate is well 

 known, is also capable of forming a blue prussiate according to 

 the state of oxygenation in which it is, and by means of processes 

 which will be explained in the course of this memoir. The fol- 

 lowing are these different combinations in the order in which 

 they presented themselves to me during my experiments. 



I. Prussiate of Starch. 



While engaged in making a small quantity 'of iodide of starch 

 in a porcelain cup, I employed in the preparation water which 

 contained prussiate of potash and muriatic acid in solution. The 

 mixture which "I exposed to the heat of a lamp remained colour- 

 less till thr heat became sufficiently strong to dissolve the starch. 

 It then suddenly assumed a -very perceptible green colovffi*... As 

 I was aware of the substances contained in the mixture, I imme- 



