C 72 J 



Lavoisier concluded from his experiments, that 

 sugar consists in 100 parts of 

 28 carbon, 



8 hydrogene, 

 64 ox v gene. 



Dr. Thomson considers 100 parts of sugar as 

 composed of v 27,5 carbon, 



7,8 hydrogene, 

 64,7 oxygene. 



According to the recent experiments of Gay 

 Lussac and Thenard, sugar consists of 

 42,47 of carbon, and 

 57,53 of water, or its elements. 

 Lavoisier's and Dr. Thomson's analyses agree 

 very nearly with the proportions of 



3 of carbon, 



4 of oxygene, and 

 8 of hydrogene. 



Gay Lussac's and Thenard's estimation gives the 

 same elements as in gum ; 1 1 of carbon, 10 of oxy- 

 gene, 20 of hydrogene. 



It appears from the experiments of Proust, Ach- 

 ard, Goettling and Parmentier, that there are many 

 different species of sugar ready formed in the vegeta- 

 ble kingdom. The sugar which most nearly resem- 

 bles that of the cane is extracted from the sap of the 

 American maple, Acer saccharinum. This sugar is used 

 by the North American farmers, who procure it by a 

 kind of domestic manufacture. The trunk of the tree 

 is bored early in spring, to the depth of about two in- 

 ches j a wooden spout is introduced into the hole ; the 



