The New York herald., 1879-10-24

ing power OF 200 dismeters. prepared lsO slides,
and have them all. For convenience have given
special names to the slides prepared from certain
iots-the barn. the Colgrove.' the Mckee and
the stomach arsenics. prepared twenty micro
scopic slides OF the barn and fourteen of the
| 'Colgrove.'"
Witness produced several card boards about twelve
by eightesn inches. covered with neatly arranged
microscopic slides. These of glass. two inches
long by threo-quarters in width. and the centre
| OF each is small whitish circle containing the
arsenic. The witness now entered upon the telling
| part of his testimony.
| "Have you examined and compared the barn
arsenic and the Colgrove arsenicy
'.Yos. sir. And lind so many and striking differ
that have hesitation III saying that they
| could not have from the same source"
| "If you knew that the Cogrove arsenic came from
certain jar in Tyler drug store and that the
! bought by Hayden on tho day of the murder
| from the jar. and Hayden told You that tho
arsenic found in his barn was the same ounce. what
| would you say?
| Mr. Watrous-I object.
| Chief Justice Park-He had better tell just what
Mr. Jones flor the defence)-we propose to show
| to the Court that
Judge Harrison nQnterruptng)-There is no ques-
ton before the Court, for withdraw the question
| that asked
Mr.. Jones-Mr. Harrison. you can't stop my
mouth that way when am addressing the Court.
wish to say this THAT do not think 1t is right
that the witness should be asked these questions
Tyler who has purposely been kept back beiieve).
to show that the Colgrove arsenic and the arsenic
bought by Hayden did really come from the same
Mr.. Harrison-we have had Mr. Tyler here. but
|
can prove by him that the two lots did from the
same original two-pound package
THE coLGRovE AND "BAIN' coNrRAsrEp
| Judge Harrison ito witness)-Please describe the
characteristics respectively OF the barn and Col
| grove arsenics
| Professor Dana-I will first describe the Colgroye
arsenic 1t consists OF crystals and also irregular
Fragments showing no trace OF crystalline
have estimated carefully possible the relative
| proportion between the distinct crystals and the
irregular fragments. l find. basing my results
| upon the whole number or slides prepared -four
teen). that it consists about onethird of distinct
crystals. find. as examine one portion of slide
| IA twenty fifth Of inch the circe), that this
| proportion varies neutrality-suspicious. only one
quarter OF the whole being distinct crystals. But
the proportion was never great one-half Of tho
greater proportion lie between l1OOOth and l500th
Moran a aoa tSan the tine
| these limits. On examining by reflected light
noted the want of perfect lnstre reaecting
Some OF the irregular fragments were larger than
| the crystals There was also large quantity Of
minute fragments. bearing the relations to the
crystals as gravel to cobble stone These are the
| characteristics Of the Colgrove arsenic.
After recess Professor Dana resumed his testi-
will now describe the barn" arsenic. 1t is COM
posed almost exclusively of regular octohedron
fully ninetenths, and on no slide less than three.
| fourths. The crystals lie between 1-100Oth and
smaller than this lowest limit some little larger
| than the upper limit-say as large as 1-S00th-and
very rarely an occasional large crystal exceeding
scope there are about four hundred objects in
view. aud among them l have found only
surfaces Of the crystals are uniformly smooth
and give good reflections when exposed light. The
never more than onequarter OF the objects Visible.
They generally less than 1-500th Of an inch in
their longest direction an lump is Of
| q very considerable size In addition to the Jumps
| of measurable sizo there are some minute frag-
dust The small quantity is explained BY the fact
that the proportion OF broken fragments which
went through the mill is small. These features
are ial he Prom ha IN
grove arsenic. The differences are:-
FWsEAs to number Of crystals compared to the
number Of irregular fragments. In the ''Colgrove"
the crystals make up less than one half of the OBJ
jects; in the "barn' they make up threefourths.
| much more minute than in the "Colgrove." whose
| cry ystals three four times larger.
Thtrd-The crystals in the "Colgrove" are dull sur
faced; in the barn" arsenic brilliant. that when
| both examined entirely pure. laid Q clean
| glass, they very different In lustre.
1 Fotrth-rhe points l make are that the Jumps in
| the "Colgrove make up never less than half the
mi,efai m m M IN .ne Vsnea' only c quarter Again tnars
| minute fragments.
| THE STOMACH ARSENIC
have mounted one sample Of the "baru' and one
OF the stomach arsenic from tho murdes3d girls
stomach and L do not base my conclusions upon OBJ
| servation, which might be made with those two
slides to-day. Since the surfaces have been
time unprotected cannot swear that tho objects
present are there to-day
Mr.. Jones dnterrup;ing)-Upon each Of the
| two?
| Professor Dana (continuing)-Yes cannot say
they absolutely the same when l mounted
| them. l mention this point because these two
slides are now in the collection with the others and
| to avoid any pointless unnecessary questions
| the future This sharp hit at the counsel
for tho defence was greeted with suppressed
| laughter all through the court roomJ
have compared slides Of the stomach arsenic with
tho "Colgrove'' slide and find the characteristics
| the peculiar conditions to which the stomach"
arsenic exposed-the solvent action OF some
| liquids upon the arsenic. The stomach" arsenic
had slightly yello owish tinge and offensive odor.
There is difference which does belong to the
chemical That difference is the presence of
an occasional Opaque fragment Of light yellow
color wh1ch T oelsve :" oe the yellow sapniaes OF
tween the stomach arsenic and common white
Frst-Tho almost entire absence Of dust like frag-
ments.
!Second-That while the surfaces of the "Colgrove"
arsensc smooth, those in the stomach arsenic
have series of parallel lines, and those along any
edge parallel with that edge. They tho lines
of an adjacent edge forming series sharp angu-
lar points. There also other triangular mark
ings, appearing as depressions on the surface,
shown by this model. Model octohedral and about
four inches made OF wood and paper. exhib-
ited) These triangles are sometimes up side down,
and all OF them resemble markings described by
action OF liquid. They are described by Darnel.
English author. in tho Quarterly Journal Of Science.
1916. Other descriptions arc given by Liedoldt,
Exner and others, and the markings by corrosion
described in various scientific Journals.
The absence of dust-like fragments in the stomach
arsenic Is due to the fact that they dissolved
by stomach liquids. On examining the 'McKee''
ana 'Colgrove arsenics nnd no dlference; all the
peculiarities present in both. 1 have compared
the Mckee" and stomach" arsenics. The surface
of the crystals in the Mckee arsenic are dull, as
those of the colgrove.' but those of the stomach
differ. Tho latter have the peculiar marked appear
ance before described.
by my microscope q circle las Of an inch in dia-
meter shows eight inches. made diasra of one of
the exhibits. frs, preparing sheet of paper with par
ael lines corresponding to those in the field OF the
microscope. These lines drawn the microme-
ter l25OOths of inch apart. found forty lines in
the space on the slide covered by the microscope
the lines-like looking through grating-cnaoling
me to ix the locations. Then, by delicate manpu-
lation OF the microscope, five different drawings
made, as to cover the entire surface of the
the slide. Then all were brought into ono
general drawing. This drawing accurately repre- |
scnts the character of the 'Colgrove" arsenic.
PICTURED.