70 



PHILOSOPHY OF ZOOLOGY. 



tcncc of syrup. On cooling, white cubical crystals will 

 be obtained. It is less sweet than vegetable sugar, and 

 the empyreumatic oil which it yields by distillation, has 

 a smell resembling benzoic acid. The following analyses 

 by GAY LUSAC, THENAHD, and BEKZELIUS, exhibit its 

 composition : 



According to BERZELJUS, it contains more carbon and less 

 oxygen than common sugar. Dr PROUT, however, obtain- 

 ed from diabetic sugar, and sugar of milk, results so near- 

 ly similar to those afforded by common sugar, when sub- 

 mitted to the same mode of analysis, that he regards them 

 all as essentially the same substances, affected a little in 

 their external characters, by small quantities of some extra- 

 neous substance. He states the result as follows : Hydro- 

 gen 6.66 + carbon 39-99 + oxygen 53.33 =100.00 f. 



Honey ) which resembles sugar in many of its properties, 

 can scarcely be regarded as a product of the animal king- 

 dom. 



8. Oils. The different bodies found in animals, refera- 

 ble to this division, vary greatly as to colour, consistence, 

 smell, and other characters. They possess, however, in 

 common, the properties of the fixed oils^ in being liquid, 

 cither naturally or when exposed to a gentle heat, insolu- 

 ble in water and alcohol, leaving a greasy stain upon paper, 

 and in being highly combustible. 



* Annals of Phil. v. p. 266. 



f Ib xi. p. 354. 



