The midland journal. (Rising Sun, Md.) 1885-1947, 1885-09-04
Scientific.

NOS~~sS
Fouls gave demonstration of the cir
culation in the web of o frogs foot by
means of the oxyhydrogen light. The
light transmitted through powerful
condenser passed through an ordinary
microscope lens, and was thrown upon
large plate of ground glass at dis
lance of about twenty-five feet with
excellent effect.
Writing on the production Of photo
graphs to scale, correspondent of the
Field says if man wants u carriage or
implement photographed so as to make
o working copy to scale, all that is nee
essary is, when a plato is being taken,
that clear and distinct threc-foot rule
be placed on the carriage or implement.
The rule is photographed with the other
object and, no matter what the size
of the print or negative may be, will
always give q true scale. Within certain
limits such procedure should prove
very useful.
eff, " says Mr.. Coleman Sellers, "a
bar of ordinary forged iron be planed
up to measure one inch square, and the
bar be one English yard long, it viii
weigh ten pounds, and the tenth of such
bar will weigh one pound more accur-
ately than will the ordinary liter of
water weigh one kilogram. The English
engineer, in these days of iron, knows
when he uses shapes of iron, rolled of
uniform section, that the tenth Of their
weight in pounds per yard gives him
the area of the section. and that this one
admirable incident will long fix the
desirability OF the present unit Of Eng
land and America"
The prediction of long epoch favor
able to agriculture in the northern
hemisphere is in danger of being falsi-
fed this year in Europe especially.
While frost has injured the fruit trees
and berry bushes and the early potatoes
in Great Britain. In France Germany,
and the south of Spain the outlook is
decidedly gloomy. The winter wheat
crop of South Russia is in very poor
condition. Farmers in Austria Hungary
are far from satisfied with the effects of
the unreasonable weather. Thus far the
weather prophets have hardly received
any confirmation of the accuracy of
their forecasts.
The difficulties experienced by draughts-
men on account of the shrinkage of
paper, a correspondent of q foreign paper
says may he overcome by system
which he has adopted for many years.
All drawing paper is ruled with very
faint lines to either one-quarter or one
fifth inch scale, and the drawing are
made to correspond with these lines.
Whatever the altera ion in size OF form
OF the paper the variation in any square
of one-quarter or one-tifth inch is O
matter of no importance, and the draw
ing and scale both being ON the same
base a ready and certain means of COR
rcction always exists.
A select committee of the British
House of Commons has after all and in
direct oppos. ton to the draft submitted
to its Chairman, issued a report fayoring
the maintenance of an overhead SIS EN-
OF electric wires in cities. This report
is justly characterized by Mr. W. Slingo
as bearing so strongly tho stamp of q
partisan spirit that it is matter of
imposslbility for an uninterested OBJ
server to regard it with equanimity :"
After thoroughly exposing the singu-
larly illogical nature of the statements
contained i'll the report and the very
ubiquitous enactments it suggests in
the course of which contention he cites
the opinions Of such high authorities us
Sir John Hawhshaw AMI DR.. Percy i'll
opposition to overhead wires, Mr. Slingo
concludes that it is to be hoped that
such legislation rs i. foresladowed by
the report may never see the light of
day, for far better would it be to LEI
things go on as they are with The certain
knowledge that catastrophe must hap
pen sooner or later, and that it would
look undignifiel to have to Withdraw II
concession once made in good faith"