t.

[24] Even in ordinary changes of weather it is interesting, as well as
useful, to mark the formation or disappearance of clouds, caused by
colder and warmer currents of air mixing: or intermingling.

[25] Depending on pressure and temperature.

[26] Sir James Ross--M. Daussy.

[27] Williwaw (Whirl-awa?) of the old sealers and whalers.

[28] Seamen call the light sails, used only in very fine weather,
"flying kites."

[29] Herschel.

[30] Dove.

[31] For a barometer of this kind, Admiral Milne has invented
self-registering mechanism, that answers well.

[32] A small turnscrew being applied gently to the screw head at the
back. This is often necessary, on receiving or first using an aneroid
that has long been lying by, or that has been shaken by travelling.

[33] It is a good weather glass--to be suspended on or near the upper
deck, for easy reference;--and is unlikely to be injured by mere
concussion of air, or vibration of wood, when guns are fired.

[34] Allowing 0,0011 of an inch for each foot.

[35] The manufacture of these useful auxiliary instruments (all French
originally) has increased much latterly: and now the patent has expired.
They might be so improved so to be worth more than double their present
value.

[36] Like the sun's edge or limb, touching the sea horizon, as seen
inverted when using a sextant.

End of Project Gutenberg's Barometer and Weather Guide, by Robert Fitzroy

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