OXIDES WITHOUT AZOTE NOT OILY. 



taste only slightly sweetish. Its specific gravity at the tempera- 

 ture of 55 is 1-543. At 59 it is soluble in 5 times its weight 

 of water, and 2 times its weight of boiling water. When the 

 crystals are melted they lose 12 percent, of water. When thus 

 fused the sugar is transparent and colourless. On cooling it 

 concretes into a white opaque mass. It dissolves but slowly in 

 water. But the solution may be evaporated much beyond the 

 crystallizing point without any crystals forming. It is scarcely 

 soluble in absolute alcohol ; but its solubility is increased when 

 the alcohol is diluted with water. In ether it is insoluble. 

 When long boiled in dilute sulphuric acid it is converted into 

 sugar of grapes. Nitric acid converts it into oxalhydric, oxalic, 

 and mucic acids. When in powder it absorbs muriatic acid gas 

 in great quantity, and assumes the form of a grey coherent mass. 

 It absorbs also ammoniacal gas, and when completely saturated 

 the weight augments from 100 to 112.4 or the compound of su- 

 gar of milk and ammonia is composed of, 



Sugar of milk, . 100- or 17.137 

 Ammonia, . 12-4 or 2-125 



Caustic potash converts it into a brown, bitter tasted substance, 

 which is insoluble in alcohol. 



When digested with oxide of lead at a temperature not ex- 

 ceeding 122, a combination takes place. The liquid is a solu- 

 tion of oxide of lead holding in suspension an insoluble com- 

 pound, which may be obtained by filtering in a covered vessel to 

 exclude the carbonic acid of the atmosphere. It is mucous, and 

 when dried becomes gray and translucent. At 212 it loses 

 water and becomes yellow. It is composed of, 



Sugar of milk, . 36-47 or 8.018 



Oxide of lead, 63-53 or 14' 



100-00 



The filtered liquid contains a soluble compound of sugar of 

 milk, and oxide of lead. Its taste is at once sweet, alkaline, and 

 styptic. When evaporated in vacuo it leaves a yellow transpa- 

 rent substance resembling gum, which is soluble in water. It is 

 composed of, 



Sugar of milk, . 81-88 t or 63*117 = 8.018 + 8 

 Oxide of lead, . 18-12 or 14- 



100.00 



