The Penn's Grove record., 1889-10-19
SCIENTIFIC

RsIdsrs In many branches OF trAdS
will he Rad TO know this method Of e.
timatinS patchwork, which II obtained
from an authority on the subject: Ordi-
nary bricks are about eight inches In
length. and with the mortar joint about
| half that IN width, % that each brick
on the fat will give . horizontal sur
lace Of about 80 square inches, or A
| bricks will cover a square foot. As
ordinarily laid there are nine courses to
| every "a inches. or Al 70 the foot. -Four
| and a half courses, with At bricks 70
! the course, will give 204 bricks 70 the
| cubic foot. Waste, cutting and closer
FONTS will easily require an allowances
OF twenty-one bricks per cubic foot.
which will be found Q very convenient
Agure for estimating the number OF
bricks required for q wall OF given
| beipht and thickness, as It thus be-
comes unnecessary to find the cubic
contents of the wall, but merely to
multiply its face area, or the product OF
its length and height in feet, BY soven-
| fourth of its thickness In inches, which,
as the thickness is always some multiple
Of four inches, is . very, simple process.
The report OF Prof. Mohn, Of Chris
| tiania, Norway, who was employed 70
| make an investigation Of the protection
afforded to buildings by lightning rods,
shows that lighthouses, telegraph sta
/ lions and other exposed buildings,
which were provided with conductors,
did not by far suffer rs much as
| churches, which, in most cases, were
unprotected. 1t appears, in tact, that
of about a hundred churches reported
! to have been struck by lightning. only
| three were provided with conductors;
that of these three the FIRST had . on
| ductor in good order, and the building
was uninjured; tine second had Q Com
| ductor of zinc wire, which melted, and
Of course left the structure without
protection; the third had a wire which
was rusty where 1t Joined the earths
and the church was burned. More
| than one.half the number Of churches
| struck were totally DESTROYED.
Durino the year 1889 there were
posted in Great Britain 81, 000, 900 LETT
tiers, Of which one in every thirteen
was frankei. Next year the number
rose TO 1863, 100, 600, although franking
was abolished. At the present time
the number reaches a grand total OF
1880, 0OO,OO0 a year.
A report recently issued by the Cor
man Imperial Statistical Department
| shows that illiteracy is very palpably
| declining among recruits for the army,
in 1876 the percentage Of men who
could neither read o write In the
whole German army was 2.27, and In
1888 it was found to have fallen to LIZ.
Whales were eaten by persons Of the
upper classes In Europe as late ut least
as the latter part Of the thirteenth cen-
fury. The tail and tongue dressed
with peas or roasted were priced a.
choice delicacies. The Princess Flea
nor de Montfort paid in 1886 the sum
Of 24s. for 100 pieces OF whale'' to be
used as food in her household.
To render leather, paper, Q c., imper-
meable, NM. Huleux and Dreyfuss
employ the following mixture: White
or yellow wax, first quality, 1000
grammes; Burgundy pitch. 69grammes;
oil of arachide, 50 grammes; sulphate
of iron, 90 grammes, and essence Of
thyme, 20 grammes. The quantity OF
tie ingredients may be varied for
special purposes.
4 process of solidifying kerosene oil
is said to have been put in practical
operation at Bakoo, the Russian min
eral oil centre Of the Caspian oil fields.
The substance has the appearance OF
tallow, and can be made into candles or
made to revert into its liquid condi-
ton. A Swedish firm owns the
process.
Professor ChoWlson, st. Petersburg,
reports the invention Of an electric
watch, which derives its motion from .
small battery. 1t Is said to keep very
good time. No details are given re-
garding the construction and arrange
ment of Its several parts, but the
mechanism must be very simple II, -
1t Is stated, the watch has only two
wheels.
At Bombay there will soon be built,
through the munifcence of Mr.. Cum
moo Suleiman, a wealthy citizen OF
that place, a dispensary where medical
relief will be afforded to women by
doctors of their own sex The Gov
eminent has promised to give q site for
the building, and the Bombay Town
Council has recommended the corpora
tionNt } contribute {, 900 rupees annually
for three years to meet current ex-
penses.
II is said that the flavor Of maple
syrup may be communicated TO cane Of
glucose strip by tincture of guaiacum
deprived or its resin by precipitation
by water. A great deal of the maple
sugar and syrup nov sold is said to be
nearly pure glucose prepared In this
way.
According to the Boston Medical and
Surgical Journal there is now living at
Penn Yam, New York, q man who has
had a bullet Embedded in his brain for
two years. Before receiving the shot
he was ~dissolute, morose and quarrel
some, but he has TO- become peacea-
BILE, sober and Industrious.
The late Professor Jevons, In a treat
Use on the coal supply OF Great Britain,
assigned to the year 1888 an output. on
the principle of estimation he adopted
or l7S, lOO. 900 tons. The actual num-
Der OF tons of coal mined was 1884,
$4,000.
ihe Gazette Medicale de r. Aigerfe calls
attention to a great number OF fmcts
which appear TO show that cider drink.
ers are not troubled with ton and