186 HOW TO TEST CANE JUICE. 
ble of yielding in the solid or crystalline form cane sugar 
only. Inasmuch as the other two varieties of sugar above 
mentioned are not distinguishable from each other by the 
ordinary chemical tests, and exhibit the same properties, 
they are recognized throughout this volume by one name, 
that of grape sugar. They form a viscid liquid, which, if 
found in large proportion in syrup, renders the cane sugar 
practically unerystallizable, by acting as a barrier to the 
union of its particles. 
An incontrovertible evidence of the presence of cane 
sugar almost exclusively in the juice of sorghum, is afforded 
in the fact that thin sections of the fresh stalk of the plant 
under the microscope exhibit the cells filled with innumer- 
able minute crystals of pure white sugar, which by their 
form and other criteria are shown to be cane sugar only. 
Scarcely a trace of any other substance is found in the cells. 
This is well represented in the engravings. 
Fig. 3 represents a thin slice of the stalk of Chinese 
cane (transverse section, from near the center of the stem), 
magnified 200 diameters. 
Fig. 3. 
* Fagts> 
=\F-s2n\e> 9g SSN Ses. 
\; 5 eA = = 
OMe a SSS 
a + 
oa 
Fig. 4. Transverse section of Neeazana or white Imphee, 
magnified 200 diameters (outer series of cells). The cells 
in this variety of cane are very large. 
The pithy part of the stalk throughout, uniformly pre- 
sents the same appearance ds that given above. - 
