The New York herald., 1879-10-23

the State these samples for comparison and to deter
general composition. On examination he said
that the state betrayed the cost of the purchases.
and that. as general thing he represented 70 lne
rats for experimental purposes; he avoided CIV
ing the object for evident reasons. aud feared
refusal il he profiered no explanation.
Mr.. Watrous-What was the object OF all this Sc
crecy?
Sheriff. make it rule in my ordinary business
not to disclose anything about 1t.
Mr.. watrous-were you specially instructed in
this instance to say nothing?
Sheriif-Not to my knowledge sir.
Mr.. watrous-why didn't you visit Madison itself
places in its vicinty?
Sheriii-Because wasn't instructed by Judge Har-
rison to 20 to any than those have named excepting
Durham, which is nearest where Hayden hveu.
There was no drug store there.
Mr.. Watrous-Did your superior, Sheriu byAoee'
know anything about all this?
Sheriff. don't know. never told him, ana we
never talked about the matter Tor three months or
more that the packages laid in his safe. until de-
livered thom to the experts c..,
Edmund Zacher lone of tho counsel for tho statel
called testified that he is a lawyer and also tutor
of German in Yale College; last january. IN the
course of the preparation OF the case he purchasea
fourteen packages OF arsenic III Hartford IN as many
different places; the packages were subsequently
delivered to Professor Dana. -,
Louis H. Zacher, of Hartford. brother of the pre-
cedinp witness, testified to accompanying ann III
purchasing arsenic: but one OF the stores visited
was a Wholesale store. but there was no intent i'll
avoiding wholesale dealers.
PROFESSOR DANA s ANALYSES.
The witness whose testimony had been awaited
with interest all day, Professor EDWARD SlNman
Dana of New Haven. now appeared on the stand.
He is a young, slightly built man. with light hair
and mustache. and has almost boyish appearance.
He was called by the State to prove the dissimilarty
between the arsenic bought by Hayden on the day
of the murder and that which he claims was the
same found in his barn. Professor Dana is twenty
nine years of and Is now assistant professor
in natural philosophy in Yale College and for six
has been an instructor in mineralogy and crys
taography. The latter. he explained. is the study
OF the natural geometrcal forms which the mineral
species assume in nature. At Heidelberg and Vienna
he finished his studies in the TWO branches and also
in chemistry. Eleven years use of the microscope
had made him. he believed, familiar with Its pow ers
aud uses in studying diatons.
Mr.. Watrous-In studying what!
Professor Dana-Diatons things so small that it
is not given to ordinary mortals to see them.
LaughterD Minute specimens OF vegetable life. for
instance. have used the miscroscope with great
advantage in the study OF crystalized FORMS and an
extended treatise on the subject appears III text
book on mineralogy which have published.
have also printed several pamphlets ON the subject
Mr.. Watrons-What Is arsenic, MI Dana!
Professor Dana-The white arsenic or commerce
is also known as arsenious oxide or arsenous acid.
1t is the metallic arsenic in combination with oxy-
gen III the proportion OF two to three. Sometimes
1t is in crystals. at others in CLASSY Jumps termed
''gass arsenic" have examined and tested many
specimens slrce January last. In examining
minerals for arsenic my test gives the white crys-
tails of common arsenic. During the past summer
visited some of the great arsenic works OF Europe,
including those or Iavestock, Devonsnlre, whence