PLANE MONSTROSITIES.–Growing out of the idea
that the wing in nature must be faithfully copied,
it is believed by many that a plane with a
pronounced thickness at its forward margin is one
of the secrets of bird flight.

A. Simple engines take live steam from the boiler and after one
expansion in a single cylinder it is exhausted to the atmosphere. A
compound engine has two cylinders, sometimes one on each side of the
locomotive; other types have four cylinders or two on each side of the
locomotive. The live steam first passes into one cylinder, expanding
down […]

which engages by means of an internal screw thread a corresponding
screw thread on the outer side of the carbon cover
The carbon electrode is in the form of a corrugated hollow cylinder
which engages by means of an internal screw thread a corresponding
screw thread on the outer side of the carbon cover. Within this
cylinder is contained a […]

space achievements
Academy One recently held an online global simulation of a series of major
space achievements. 16 schools (from five states and four nations)
participated. Here are several of the descriptions of their projects:

a difficult task, is not as complicated as would appear,
and with the object in view of making the
subject readily understood, an explanation will be
given of the terms ‘Diameter,’ and ‘Pitch,’ as
used in the art
The making of a propeller, although it appears
a difficult task, is not as complicated as would appear,
and with the object in view […]

MATERIAL FOR PROPELLERS.–Very light propellers
can also be made of thin, annealed aluminum
sheets, and the pins in that case will serve as
guides to enable you to get the desired pitch.
Fiber board may also be used, but this is more
difficult to handle.

_A._–All the cocks about an engine should be provided with bottoms and
stuffing boxes, and reliance should never be placed upon a single bolt
passing through a bottom washer for keeping the plug in its place, in the
case of any cock communicating with the boiler; for a great strain is
thrown upon that bolt if the pressure of […]

A. In case the regulating valve would not admit sufficient steam to the
train pipe, would take it apart and block the steam valve open. If the
pressure ran up too high in the steam heat train pipe, would control it
with the steam throttle at the boiler head.

cheap motor which is light, and adapted to run
for several minutes, which would be of great value
in work of this kind, but in the absence of such
mechanism rubber bands are found to be most
serviceable, giving better results than springs or
bows, since the latter are both too heavy to be
available, in proportion to the amount of […]

Fig
The repeating coil is indicated symbolically in the two diagrams of
Fig. 115. Where there is no necessity for indicating the internal
connections of the coil, the symbol shown in the left of this figure
is usually employed. Where, however, the coil consists of four
windings rather than two and the method of connecting them is to be
indicated, the […]