(A) (B) (A) (B) (A) (B) (A) (B) 226 199.3 245 216.3 264 233.4 283 250.4 227 200.2 246 217.2 265 234.3 284 251.3 228 201.1 247 218.1 266 235.2 285 252.2 229 202.0 248 219.0 267 236.1 286 253.1 230 202.9 249 219.9 268 237.0 287 254.0 231 203.8 250 220.8 269 237.9 288 254.9 232 204.7 251 221.7 270 238.8 289 255.8 233 205.6 252 222.6 271 239.7 290 256.6 234 206.5 253 223.5 272 240.6 291 257.5 235 207.4 254 224.4 273 241.5 292 258.4 236 208.3 255 225.3 274 242.4 293 259.3 237 209.1 256 226.2 275 243.3 294 260.2 238 210.0 257 227.1 276 244.2 295 261.1 239 210.9 258 228.0 277 245.1 296 262.0 240 211.8 259 228.9 278 246.0 297 262.8 241 212.7 260 229.8 279 246.9 298 263.7 242 213.6 261 230.7 280 247.8 299 264.6 243 214.5 262 231.6 281 248.7 300 265.5 244 215.4 263 232.5 282 249.6 =145. Preparation of Levulose.=—It is not often that levulose, unmixed with other reducing sugars, is brought to the attention of the analyst. It probably does not exist in the unmixed state in any agricultural product. The easiest method of preparing it is by the hydrolysis of inulin. A nearly pure levulose has also lately been placed on the market under the name of diabetin. It is prepared from invert sugar. Inulin is prepared from dahlia bulbs by boiling the pulp with water and a trace of calcium carbonate. The extract is concentrated to a sirup and subjected to a freezing temperature to promote the crystallization of the inulin. The separated product is subjected to the above operations several times until it is pure and colorless. It is then washed with alcohol and ether and is reduced to a fine powder. Before the repeated treatment with water it is advisable to clarify the solution with lead subacetate. The lead is afterwards removed by hydrogen sulfid and the resultant acetic acid neutralized with calcium carbonate. By the action of hot dilute acids inulin is rapidly converted into levulose.