32 Mr. Stenhouse en Chloropicrinc. 



Ultimate analysis, in the fresh state, — 



CarboD, 8-19 



Hydrogen, 1'32 



Nitrogen, 0-39 



Oxygen, ITSG 



Ash 0-93 



Water, 77-81 



10000 

 When dried at 212°,— 



Carbon, 3699 



Hydrogen, 594 



Nitrogen, 1-80 



Oxygen 5114 



Ash, 4-13 



100-00 



From the preceding analysis, it would appear that the difference 

 between the yam and potato is not considerable. The fibrous ligneous 

 matter is greater in the potato than in the yam. In the analysis of 

 Einhoff, probably a portion of the starcb was not separated from the 

 woody matter, as it is rather a difficult task ; indeed, he terms it fibrous 

 starchy matter. There is also more albumen and casein in the yam ; but 

 in the potato analysis, from the fibrous matter predominating, the albumin- 

 ous matter must be deficient, as it is retained in the fibrous matter. 



To ascertain if the fibrous matter contained any nitrogenous matter, it 

 was subjected to analysis, and found to contain 0-161 per cent, in the 

 fresh state, and 0-725 per cent, dried at 212°. 



From the yam having more albuminous and nitrogenous matter, it is 

 thus the most nutritious. Potato contains 1 nutritive to 9 calorifiant ; 

 yam 1 to 8J; and 17 pounds of yam are equal to 18 pounds of potatoes, 

 being 6 per cent, in favour of the yam. 



Mr. Simons exhibited an Electro-Magnetic Machine, constructed by 

 himself. 



28<A March, 1849. — TJie Pkesident in the Clmir. 



Mr. Robert Sinclair was elected a member. 



Mr. Stenhouse exhibited and described a new oily body called Chloro- 

 picrinc, obtained by boiling either charbazotic, oxypicric, or chrysammic 

 acids with an excess of hypochlorite of lime. 



Mr. Stenhouse also exhibited and described the properties of gyrophoric 

 acid and its ether. Gyrophoric acid is the colouring principle of the Gyro- 



