The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1856-1888, 1865-10-21

JGlCt Vi 1-Db - thdI Vi AAr IIteIldLlc sugar. or
dinarily it is LIS, as | have found. operating il
, more favorable conditions. An optical exauiina
ton, also, in such cases, furnishes directly, and
after inversion Of the liquor, some ~notations
which show, for a determinate temperature, that
the rotary powers of crystallizable and leyulose
sugar are generally alike, or differ only in an
insignificant manner. This inconsiderable guam
tlty Of Uncrystalllzable sugar varies, but is certain
when the experiment is with juice coming from
every portion OF the plant az 1 have Indicated
1t Increases IN L very sensible manner in proper
ton as the juice is from the between-ioints
nearer the upper extremity, and diminishes as
you 90 down 10 the middle Of the stick. where il
generally becomes inappreciable.
I'd. II, IN place Of examining the body OF the
cane, you experiment with that portion enyel-
oped IN green leaves and sheltered from the ac-
ton OF the direct rays of the sun, there Will be
found in the juice extracted from IL a considera-
Die quantity Of uncrystaliizible sugar, which
may De valued on an average for ripe canes al
l-6 Of the crystalIizable sugar, and for canes not
yet arrived 1T their terms of development, at 10
Of the same weight. Optical analysis, then.
leads to some very opposite results from chemical
ones, a thing worthy Of attention, and which
stimulates 70 new researches. These results are
not always identical in respect TO the same guam
tIty OF sugar discovered through the chemical
process. There are then produced, under GER
tain circumstances, depending upon the age of
the plant and the activity of growth. some per-
turbatsons which-let US call il a seduel-can
be explained only through the notable differences
IN the rotary power of the uncrystallizable sugar
which exists in that portion of the cane. The
liquid sugar deviates always to the right plane
OF polarization; but after inversion, the left
notation Is rarely connected Zen rdppOTt) with
the total quantity of interyerted sugar which the
liquor contains, and is generally found expressed
by an inferior figure To that which ought 10
have been obtained. Among other examples,
which would cite if necessary, there is one
that Will give an idea of the considerable dimi-
mutton which this figure undergoes. Juice ex-
tracted from the superior extremities of Young
Bellouguet canes, and having a density of 1890,
at q temperature of 250 centgr.. has given a
direct notation + 8, 3. and at o. center. a
notation indirect = 6, l indicating after acid
~ulation, a quantity Of sugar equal to I7-IOOO of
the weight of juice, whilst this same LIQUID con-
tanned really $4,000.
The proportion of uicrystallizable sugar in
the head or summit OF the cane, in the same
manner as the body, increases in proportion to
Its distance from the lower part, and the place
which contains it in the greatest quantity is that
winch the sheaths games Of the green leaves
shelter completely from the light. That part of
the head OF the cane Of which the skin is very
tender and uncolored, remains so as long as il
escapes the action of the sun, and is the princi-
pal seat of the liquid sugar which the plant
contains but as soon as the leaves become drv
and uncover 1t, then externally it commences to
take a color more and more deep, and at the
same time the uncrystallizable sugar disappears.
little by little, from it's tissues, in order to give
place to proper and crystallizable sugar. This
remarkable transformation can be very easily
observed upon ike canes from the same hill,
(S0nhe) analyZlnS them at intervals of a few
days. and from those parts of the cane more or
less concealed by the leaves and afterwards the
corresponding parts of the other canes, in pro-
portion as they are disengaged from the leaves
and colored by the influence of light.
Sd. The age of the cane appears to us only
an indirect cause of the phenomena we have
mentioned. In placing the young canes in the
conditions Of aeration. of light, and of the ordi-
nary vegetation OF this plant till it attains the
term OF Its ordinary development we have not
by that established anything special in regard to
the relation of liquid and crystallizable duanti-
ties contained in the body or head Of the cane.
However, IN a general manner, We can say that
cane contains more uncrystallizable sugar in
proportion rs 1t ~ more young but it is to the {
active vegetation Of which it is then the seat.
and tor the want of the solar rays upon the
stem closely enveloped by the hills, thIckly heset
with leaves, that, we believe, must be attributed
the enormous proportion of suc,e i,ferIerfi
which 1t contains.
4th. Active or ceasplcss vegetation exercises.
In this respect, an influence as great and not less
appreciahle than that of light, Of which we nave
Spoken lanes arrived ut maturity, and contain
ing no trace of levulOse in the leaf mid-ribs fparfie
0ediane) of their length, are charged very rapidly
with a large quantity of this substance when it
resumes again its rapid growing, and So long as
their green and Widespread leaves tend actively
ieHt" lhclnscIfeS, 80 the shoots are dISenga geu,
and 50 long as the plant preserves that appear
ince which Is peculiar To it while it continues To
row, one can see that its juice is richly provided
with uncrystallizable sugar, principally in the
tissues and in the ratio to their less
exposure to the light. In humid localities,
Nhere the canes never rlpen. and are constantly
n tuIl sap, (SeUe,) the uncrystallizable sugar ex-
SITS always IN all parts of the plants. and some
lines IN a truly considerable quantity. Last
december, which is the extreme iag end of the
;rop-season of Mauritius.l after the continuous
ANS winch produce SO profound perturbations
II vegetation, the juice extracted from the BODY
Bellouguet cane taken from one of the more
'atered localities of the Island contained s. 3 per
'ent. OF sugar, of which IL per cent. was sucre
and 90 per cent. only of such nature
to be crystallized. During the whole time of
'uttlnS the last crop, | have made Investigations
lpOn this subject in different regions of the
which have confirmed the opinion l hao
'efore arrived at through a previous examination
ipon my own estate. | have always discovered
d the specimens OF canes or the Juices l have
and which came from estates in which
he natural humidity was then Cast December)
increased by the abundant rains
No out OF season, a quantity of uncrystallizable 8
lgar much greater than contained in the pre- B
edIng canes gathered from the sam locality. =
nus l have found an average of II grammes of D
igar-llquld (molasses) in 1000 grammes of G
lice, from an estate that had been abundantly :
altered during the whole harvest, and only / c
rammes from another estate placed in more IA G
circumstances. When we seek the pro- .
ortlon In which Is presented the two species of
lgar at different phases of its growth, we ALWAYS
iscoVer that Ii Is In canes growing the most
ipld that the greatest quantity of levulose ex-
u anu IN TINS connection canes called foHe or