Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1910-08-19
SCIENTIFIC MISCELLANY.

There will be enough to eat during
the next forty years at least. II the
| conclusions OF Prof. NJ A. Carleton,
| or the United States Department of
Agriculture, are Justified OF the
lisOO,947,200 acres constituting the
total land area of the United States,
the farms occupied s3s,5e1.774 acres
In 1900. and should exceed l3OO,-
100000 acres in 1850. when the inn
proved farm area should be $50. 00O,-
600 acres. The area in wheat-which
has averaged SO per cent for several
decades-should be s per cent by
1850 or a total of about so. 200. 900
acres. At 20 bushels per acre. six
bushels being allowed as the increase
In Yield, this area would produce
1.6OO,0OO,000 bushels of wheat. one
prediction Is that the United States
viii have a population OF 100000 600
In 1850 and II this should he realized
and the per capita consumption OF
wheat should increase from the pres
ent bushels to bushels. then the
country can Just supply It's own
wheat. II IL extremely improbable
however. that either population or
consumption viii reach the high point
named. To the 800. 900. 900 bushels es-
tlmated as the increase in United
States yield may be added 1900, 000,-
600 as the probable Increase In pro-
duction Cf Canada the black earth"
urea VI tdNlfIl Europe ana GlDtTld.
and Argentina, making total increase
OF 100000, 900 bushels in the chief
exporting countries. Reasons are
found for placing the worlds demand
for wheat at $500. 900 bushels
i'm 1850, an increase OF 100000, 900
bushels ever the present, so that an
ample supply is probable.
The thoracograph OF DR. DufesteI
includes an 1s-inch copper ring
which is placed around the subjects
body, and supported at any desired
height. As a small carriage moves
around the ring. an ebonite wheel
pressing against the PERSONS body
acts on "A pantograph that draws on
cross-ruled paper an exact contour of
the chest--innated or debated,
Heating lubricating oils to 450 de-
grees +. Is the simple test given the
American Society Tor Testing Ma
terials. Inferior oils darken; good
oils show little change.
The so-called dew ponds" of the
downs" or grassy uplands. Of the
south of England. are still an interest
ing problem. They are all artificial,
some of them modern but Others cider
than the knowledge of man. and they
may supply the hilltop with an
abundance of water while the low
land is parched with drouth They
may be 80 to Il feet in diameter. the
depth of water being not more than
three or four feet. An impervlous
bottom Is necessary to the dew-pond.
and usually consists of layer OF
puddled chalk or clay, over which is
spread n layer OF rubble, with
straw between or below the two
layers. A current theory Is that this
heat insulated bottom condenses the
invisible moisture OF the air into dew.
that keeps the cool basin filled IL
appears that this view Is not univer-
sal. however. for in some localities the
ponds have been known as cloud
ponds "fog-ponds." or mist
ponds" Among meteorologists. the
opinion has been expressed that rain
alone may NIL the basins. although
their position on SUBMITS does not
admit of accumulation by drainage.
After extensive observations On be-
half of the Royal society, Edward a.
Martin concludes that much OF the
water Is supplied by the sea-fogs orr
mists that are common In Sussex and
Kent and carry heavy loads of mCis-
ture. Places especially exposed to
these fogs seem TO have been pre-
ferred for the ponds.