b. Barometers ML-102-D and ML-316/TM. (a) Pressure sensitive
(b) Lever system
(2) Case. (a) Wooden base and lid.
(c) Dial cover.
(d) Temperature correction and conversion chart.
(3) Carrying case with strap.
a. Barometer ML-102-B (fig. 1).
Externally, Barometer ML-102-B is identical to Barometer M L -102-F.
Both are contained in black metal cases and leather carrying cases. The
internal mechanism of Barometer ML-102 -B, however, differs from
all other models, for it has five pressure cells and a more complicated
b. Barometer ML-102-E (fig. 1). The case
is of metal, painted dark green, with a crackle finish. It has a solid back
provided with a metal rim which holds a nomograph and temperature
correction chart, calibrated specifically for each instrument. This model
has two pressure sensitive cells (for complete description see par. 17) .
c. Barometer ML-102-F (fig. 1). The exterior
of this model
cal to that of Barometer ML-102 -B. The interior is identical to that of
d. Barometer ML-102-D. This barometer differs both in appearance
and construction from other Barometers ML-102 -(*). Externally it is
housed in a square wooden case; the internal mechanism contains only
one pressure cell. It is of much lighter construction than Barometers
M L -102 B, ML-102 -E, and ML-102 - F .
e. Barometer ML-316/TM. This model is identical to Barometer
M L -102-D in appearance and construction, differing only in the range
a. Essential components
of aneroid barometer.
The aneroid barometers covered in this manual consist of the follow-
(1) An almost completely. evacuated metal cell (or cells) sensitive
to changes m the atmospheric pressure.
(2) A system of levers and gears by which the motion of the cell is
magnified and transmitted to a pointer. The cell and lever system is
hereafter referred to as the aneroid mechanism,
(g) A dial on which the pointer indicates the changes or pressure.
b. Pressure range. (1) Barometers ML102 B, ML102 E, and
M L -102-F. The range of pressure of these instruments is 1085 to 745
millibars and 31.5 to 22 inches. The dials are graduated in both milli-
bars and inches.
(2) Barometer ML-102 -D. The range of pressure of this barometer
is 1065 to 745 millibars. The dial is graduated in millibars only.
( 3 ) Barometer ML- 3 1 6 /TM. The range of pressure of this bar-
ometer is 1065 to 610 millibars. The dial is graduated in millibars only.
c. Dimensions and weight. The following tables gives the dimensions
and weight of the barometers covered in this manual: