534. 



Dr. Stenhouse's Analyses of the 



of the ashes of sugar-canes from various localities in the 

 West Indies. 



The first table (A) contains the results of these analyses, in 

 which, after the insoluble matter, consisting of coal and sand, 

 and the loss (iron), have been abstracted, the constituents are 

 calculated in the relative proportions per cent, which they 

 bear to each other. In the Table A. an error has been com- 

 mitted, by calculating that portion of the sodium and potas- 

 sium which undoubtedly existed in the canes in the state of 

 chlorides, as potassa and soda, thus introducing an excess of 

 oxygen, amounting in Nos. 3, 9 and 10 to 2 per cent., and in 

 No. 8 to almost 4 per cent. To remedy this error, a second 

 table (B) has been constructed, in which that portion of the 

 potassium and sodium, which in the canes are united to chlo- 

 rine, are calculated as chlorides. 



A. Per-centic results after abstracting the charcoal and sand. 



B. Contains the results of the same analyses as Table A., but 

 the chlorine is represented as united to sodium and potas- 

 sium. 



Nos. 1, 2, 3 and 4 were very fine full-grown canes from 

 Trinidad, consisting of stalks and leaves, but without the 

 roots. I am indebted for them to the kindness of Messrs. 

 Eccles and Co. of Glasgow. Nos. 5, 6 and 7 were very si- 

 milar canes from Berbice, furnished me by James Laing, Esq., 

 from his estates in that colony. No. 8, consisting of the stalks 

 without leaves from Montrose estate, Demerara, was kindly 



