The Sun.
London, England, 1857-07-16 00:00:00

IN RE H. J. CAMERON.

To-day was appointed for the choice of assignees ill
this case. The plantiff was described as of Hyde-park
Gardens, &c. Messrs. Linklater and Hackwood and
Mr Chidley are the j,,int solicitors to the petition ; but,
owing to the pressure of antecedent business, the choice
will not take place till Lite in the day.

POLICE INTELLIGENCE.— (This Day.)

MA.RLBOROUGH-STREET.

INCITING YOUNG CHILDREN TO STEAD. Joseph
Collins, a castermonger, was charged before Mr. Bing-
ham, in conjunction with a boy named Henry Croses
aged 12 years, with stealing a quantity of boots, &c.
It appeared from the evidence that on Wednesday
night lase, Collins was in Windmill-street and met the
prisoner Cross (whose father is a workman in the env
ployment of Mr. Rose, boot and shoemaker in the Bur•
liogton Arcade) and asked him if he had any boots.
Cross replied that he had, and gave him three pairs,
which were subsequently pawned. Last night the pri'
soners again met, when Cross gave Collins four more
pairs of boots. Cross gave Collins a pawnbroker's
ticket and received a shilling from him.
Joh❑ Davy, aged 11 years, living in Hopkin's-streets
proved having seen Cross come out of the shop of Igt.
Rove on Saturday with some boots. He was with the
prisoner when Cross gave Cabins the boots.

In answer to Mr. Bingham, Davy said he only beceo3°
acquainted with Collins on Saturday last.
Mr. Rose said that the father of Cross worked for him►
an 1 that he had lost a great many boots, Witness WO
not able to say what was the quantity of boots he b 0
lost, but he should say from 201. to 301. worth ward

missing.
Police-constable C 145, who took the prisoner into
custody, stated that he could produce the pawnbroker
at
whose shop Collins had pledged some of the articles..
Mr. Tate, Cambridge-street, an assistant at gr.;
Aldous, identified the prisoner Collins as having pawned
some of the goods at their shop.
Mr. Bingham directed the depositions to be taken
against the prisoners, for the purpose of their committal
for trial.

THE ELECTRIC CONDUCTIVITY OF

COPPER WIRE'S.

Professor W. W. Thomson, in measuring the re3lgt(
ance3 of wires manufactured for submarine tele"
graphs, was surprised to find differences betwee!c,
different specimens so gloat as most materiallY;f
effect their value in the electrical operations foe
which they are designed. It seemed at first the
the process of twisting into wire rope and covering
with gutta perchamust be looked to to find the e%Ply'
nation of these differences. After, however, a care
ful examination of copper wire strands some covered'
some uncovered, some varnished with india-rubber;
and some oxydised by ignition in a hot flame, it 13
ascertained that none of these circumstances 10.13-
dueed any sensible influence on the whole fei
sistauce, and that while there is some degree
constancy in the quality of wire supplied fOl3,
.0
the same manufactory, there is vast superiorlb
in the produce of some manufactories c„.
that of others. A submarine telegraph o%i
structed with copper wire of one manufactory
0,
only 1-21 of an inch diameter, covered with gabto
percha to a diame er of a quarter of an hid), ifut
1„,
with the same electrical power, and the same ;
struments, do more telegraphic work than one 000
structed with copper wire of another manufoGer',
of 1-18 of an ini.iti diameter covered with gutta Pe'.;
cha to a diameter of a third of an inch. Wil
is the cause of these differences in electrt
quality is a question of much 'practical /P;
110
portanco and high. scientific interest. A
result of experiment shows that the great,°oo
degree of brittleness producible by teol 0.
do. s not alter the conductivity of the metal 11 0
much as one half per cent. A similar experioely
showed no more sensible effect cn the condueal
it
of copper wire to be produced by hammering 0,
flat. There are no doubt slight effects on the c°o
ductivity of metals produced by every applicati°l3:
and by the altered couditi in left atter the to
drawat of excessive stress ; but these are folio' 0
be in all cases so minute that the present results/,
to copper , ire are only what are to be expecten•
Mechanic's Magazine.

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