The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1856-1888, 1882-06-24

Da'", auu eNaporated 70 dTyness by u gentle heat.
Ihe residue was treated with strongest pure
nitric acid, and carefully eYaporated 10 dryDess
aud this treatment with nitric acid, and the con-
sequent evaporation, were repeated three times
successively- A few drops of a strong solution
OF caustIc soda we're now added to the residue,
ana next one part Of fnely-pulverized pure nitrate
OF soda. The mixture being carefully dried, was
heated gradually in a thin porcelain crucIble
until 1t fused into a colorless mass, the heat
being guarded meanwhile with extreme care.
Alter cooling, some hot distilled water was added,
tue mud filtered, strongly acidi6ed with pure
sulphuric acid, and evaporated in a porcelain
capsule upon the water bath until fumes of sui
phuric acid began TO rise. To make sure OF the
entire absence of nitric and nitrous acid COM
pounds, the treatment with chemicslly-pure sui
phu-ic acid was repeated. The resulting solution
OF a very acid reaction was now introduced into
an active Marsh's apparatus, while a part of the
reduction tube OF the latter was kept in a state
OF Incandescence, and while the escaping hydrogen
gas was kept burning. No metallic mirror APP
peared upon the contracted portion of the com
oustlon tube no change took place in the color
OF the hydrogen fame, and no spots could be OBJ
tanned upon cold porcelain plates exposed to the
latter flame. The fame being extinguished. and
the rectangular portion of the combustion tube
having been turned down into a very dilute solu-
ton OF nitrate OF silver, very slightly aciduleted
by a small drop OF pure nitric acid. no precipltate
was fotaIned. and no change on subsequently
testing this solution With ammonia. The result
III every Instance was negative.
II. A portion of the stomach, and the small
ard large i~ntestines from Jars \ and Il were cut
into hne shreds and introduced into a tubulated
TetUrt. About the same weight Of pure HYDRO
chloTic acid was added, aud afterwaId sufficient
pure distilled water TO form a tiIn, pastv mass.
A tubulated receiver was attached to the neck Of
the retort by a perfect V tight fitting cork, and a
bent glass tube was attached 10 the tubulure of
the receiver by IA similarly-fiting cork, ana made
to dip under tie surface OF pure distilled water
contained in Il cylindrIc glass vessel. The ret0rt
was placed upon Il water-bathI. and heat applied
cautiously From time to time small quantities
OF pure powdered chlorate OF pOtassa were now
added by the tubuluTe in the retOrt, and the pro-
cess continued, gently shaking the mass OCCASION
ally until homogeneous and of a yellowish color.
The heat of the water-baIh was continued until
all the free chlorine had been discharged, after
which the liquid was left to cool. and then
filtered. The filter was thoroughly washed with
pure distilled water, and the w~ashings were con-
centrated separately on a water-bath at a tenn
perature not exceeding l70. Fahrenheit, and then
added to the rest. 4 continuous stream Of
washed sulphurOus acid gas was now passed
through the liquid To complete suturutiun, after
which 1T was exposed to the heat oi Il water bath
until all the sulphuruus odor tad entirely dIsap-
peared. The solution Was filtered into a tall
beaker glass of hard German glass, free from lead.
A continuous current of washed sulphuretted
hydrogen gas was now passed through the liquid
for twelve consecutive hours. Toward the end of
the process. the liquid being fully saturated with
the gas, the beaker was heated to about 100
Fab, by surrounding 1t with hot water, the gas
passing meanwhile continuously and unInter-
ruptedly. Being allowed to cool again, the cur
rent of the gas was allowed TO pass TOR Two hours
longer, when it was stopped, and the beaker,
closely covered by a ground glass plate, was set
aside 10 a quiet place for twenty-four hours. The
dirty, brOwnish precipItate, very light, and easily
dispersed through the fluid by slight shaking,
and which was evidently largely composed of
sulphurated organic matter, was now collected
upon II small filter, and washed first with water
containing sulphuretted hydrogen, and, after the
washing gave no longer indications of the presence
of chlorine, with pure distilled water. The pre-
cipitate thus obtained was divided into three un-
equal parts. Part a WIS treated with solution
OF ammonia, washed with dilute ammonia, fl
tered, and the fltraIe eva urated at a gentle heat
over "a water-bath. The residue was treated re-
peatediy with Tuning nitric acid, evaported to
dryness, and then fused with nitrate of soda, as
UeTore uesCtIbcd, in Il IIiH pUrCofuiu capsuie.
After treating the residue with pure distilled
water, the solution was ascIdulated with pure
sulphuric acid, filtered. washed, aud eva pOrated
on a water bath until all the nitric and nitrous
acid compounds were eliminated. On introducing
the highly acid solution into an active Marsh g
apparatus, which had bee, SCI up and tested
with every precaution, no i"dira Ions of poison
were obtained. The contents % the filter used
as above-described, IN every instance, were ex-
amined with great care tor anthony, corrosive
chloride OF mercury, and Oihers pa sons, but al
ways witt negative results Part B.. the second
portion OF the precipttate by Suipruretted Hy-
drogen, was while still moist transferred to an
other small filter Of Swedisti paper. and treated
with ammonia, and washed with dilute solution
of ammonia. The solution were mixed in "A thin
porcelain capsule, and carefully evaparated to
dryuess upon Il water bath. The residue was
washed with not pure distilled water. After
decantatIun, il was repeatedly disested with pure
alcohol, again deca1ted. and next treated with
chemically pure llydrOchioric acid, alter which
it was again washed with pure distilled water,
and carefully dried upon u water bath at a gentle
heat.
DR.. Stangenwuld concludes his account of his
analyses with the following remarks
sit would probably be tedious to numerate
any more of the tests employed, and therefore |
will merely add, that four different modification
Marsh's apparatus, suitable to deal with small!
and large quantities, have been constructed for
this analysis, and that the parity of the tests en-
ployed was suci, that not in a single instance
spots of a doubtful nature were obtained from
any Of them, even after an exposure Of several
hours duration. lin order to form a correct
idea Of the accuracy and delicacy of these forms
of apparatus, as constructed for this analysis, |
moved some of them into a distant apartment,
after all the COrk pertaining 10 the analysis proper
had been finished. a solution containing one
thousandth part Of a grain (l-l000) of arsenious
acid in one fluid dram OF distilled water was pre-
pared, and when the apparatus. was in perfect
order. the portion just in front of the first narrow
ing Of the combustion tube in an incandesccnt
state, and while the escaping gas was burning,
this was poured into the bottle through the funnel
tube. and was washed down with a small quantity
of distilled water. Within a few minutes over.
whelning proofs of the presence Of arsenious
acid were obtained. and not alone a well defined
metallic mirror in the contracted portion of the
combustion tube, bat also four well defined de
posts upon cold porcelain plates, each one large
enough to admit of further testing by nitrate OF
silver and other tests III therefore conclude.
that speaking within moderate limits, if the five
hundredth part of "A grain (l-500) of the poison
had been present in the tissues sui iected to analy-
sis, it could not well have escaped detection dur
ing the very thorough and searching investigation
above described.
St. Pauls Chapel, Broadway, New York,
has the oldest town clock in the CITY, hay-