e HCl.

4. Pea starch, first crop, washed with alkali, acid (HCl), and
strong alcohol.

5. Natural dextrin, D = 3.87, alpha_{D} = 194.7; K = 0.95, (c
2.628).

6. alpha-Dextrin, C equation purified without fermentation, 30
precipitations with alcohol (Trans., 1879, 35, 772).

The examination of these specimens was conducted on a smaller scale, but
under the same conditions as before, _one gram_ of the substance being
treated with 12.5 c.c. of the saturated chloroform solution and heated
in sealed tubes for two hours as above. The results were as follows:

Weight of
crude residue.
1. Rice starch 0.046 crystallised at once by 'sowing.'
2. Wheat starch 0.044 " "
3. Oat starch 0.049 " "
4. Pea starch 0.064 " "
5. Natural dextrin 0.088 " "
6. alpha-Dextrin 0.055 " "

The results may therefore be summarised as follows:--Treated under these
particular conditions all forms of cellulose give large yields of
omega-brommethylfurfural, some varieties giving as much as 33 per cent.
Laevulose, inulin, and cane sugar give yields varying from 22 to 8.5 per
cent.; various starches give small yields (average about 4.5 per cent.);
and dextrins 5 to 8 per cent., whereas dextrose, milk sugar, and
galactose give, apparently, none at all.

The yields represent the solid crystalline residue; this when purified
by recrystallisation gives, probably, about three-quarters of its weight
of pure crystals. (In the case of dextrose, &c., the yields represent
the weight of syrup.)

These numbers, however, by no means represent the maximum yields
obtainable, owing to the comparatively slight solubility of hydrogen
bromide in chloroform. The process was conducted in the above manner
only for the sake of uniform comparison. The ether method previously
described gives much larger yields; for example, 12 grms. of inulin
treated with only 60 c.c. of the saturated ether gave 2.5 grms. of
substance. For the purpose of obtaining larger yields, other methods are
being investigated.

The facts recorded above, taken in conjunction with those given in our
previous communications, appear to point definitely to the following
general conclusions. First, that the various forms of _cellulose_
contain one or more groups or nuclei identical with th