Passaic City record., 1892-05-21
SCIENTIFIC AND INDUSTRIAL.


Pearls from Ceylon will be scarce this
year. Violent storms have washed away
ali the oysters from the famous banks, so
that the annual fishery must be aban-
dcned.
An attempt has lately been made to
cultivate oysters In the Baltic. Last
summer SO, 900 were transplanted from
the North Sea, but the experiment has
been failure.
The brain of Schneider, the Austrian
assassin, who murdered eight servant
girls, was shown by the post mortem ex-
animation to be affected with hydro
cephalus SO that nearly all moral sense
was gone.
The volcano of Kilauea is very active
at present. The cavity produced by the
last breakdown has not filled up, but
there is an active lake two or three hum
dred feet below the general level of the
floor and quarter OF mile in diane
ter.
Doctors maintain that no more favor
able medium for the culture of micro
organisms can be found than warm sew
age. Cases are cited in which hot water
and steam introduced into old cesspools
have resulted in an epidemic of diph-
liberia.
The installation of the multiple speed
and traction system of platforms which
has been in operation at the Worlds
Fair grounds in Chicago for the past six
months is now assuming much more
complete form that would seem to be in
dicative of success.
DR.. B. w. Richardson states that he
has occasionally subjected two animals of
the same age, breed and condition SIM
ultaneously to the same atmosphere of
chloroform and common air, and has
found one dead and the other alive, and
apparently free from danger.
Mr.. Yarrow says that the cause of vi
bration in screw vessels when running in
smooth water with their propellers well
immersed is mainly due to the forces
produced by the unbalanced moving
parts of the machinery, such as pistons,
piston rods, valves, gear, ETC.
The famous clock in Strasburg Cathe-
dral is the only timepiece with marks
the old time in Alsace- Lorraine, now that
the whole province has adopted the
Greenwich meridian. Experts declare
that any attempt to alter the routine OF
the clock would effectually disarrange
4 the elaborate mechanism.
~ According to Lord Rayleigh, if the
heat engines of the future are at all an
alagous to our present steam engines,
either the water, as the substance first
heated, will be replaced by fluid of
Hess Inherent volatility, or else the vola-
#tility of the water will be restrained by
the addition to it of some body held in
solution.
81 In regard to the various processes pro-
posed for the recovery of metallic iron
!. from Stag, writer in London Iron re-
marks that, though in very many cases
the slac as taken from the furnace will
be found to contain large amount of
iron in metallic state; which will well
repay for any moderate outlay in its re-
covery, an essential point is that all the
work be as nearly as possible automatic.
A machine often wanted is small,
cheap and efficient water motor for driv-
ing small dynamos for laboratory or
Trade purposes. Such motor is now
successfully used and consists of simple
arrangement of force buckets propelled
under high pressure, house or other
wster supply. Inside the case is thin
drum of considerable diameter, on the
circumference OF which are small double
buckets. The water entering by the
supply pipe impinges with force on these
buckets and drives the wheel with great
rapidity and power.