BAROMETER WARNINGS.

	May be Expected
	-----

Increasing storm	If mercury falls during a high wind from S.W., S.S.W., W. or S.
Violent but short	If the fall be rapid.
Less violent but of longer continuance	If the fall be slow.
A violent storm from the N.W. or N.	If the mercury falls suddenly while the wind is due W.
N.W., N., or N.E. winds, or less wind, or less rain, or less snow	If the mercury having been at its usual height, 29·95, is steady or rising, while the thermometer falls and the air becomes drier.
Wind and rain from S.E., S., and S.W.	If the mercury falls, while the thermometer rises and the air becomes damp.
A violent storm from N.W., N., or N.E.	When the mercury falls suddenly with a W. wind.
Snow	If the mercury falls when the thermometer is low.
Less wind, or a change to N., or less wet	When the mercury rises, after having been some time below its average height.
Strong wind or heavy squalls from N.W., N., or N.E.	With the first rise of the mercury after it has been very low (say 29).
Improved weather	When a gradual continuous rise of the mercury occurs with a falling thermometer.
Winds from S. or S.W.	If the mercury suddenly rising, the thermometer also rises.
Heavy gales from N.	Soon after the first rise of the mercury from a very low point.
Unsettled weather	With a rapid rise of the mercury.
Settled weather	With a slow rise of the mercury.
Very fine weather	With a continued steadiness of the mercury with dry air.
Stormy weather with rain (or snow)	With a rapid and considerable fall of the mercury.
Threatening, unsettled weather	With an alternate rising and falling of the mercury.
Much wind, rain, hail, or snow, with or without lightning	When the mercury falls considerably. If the thermometer be low (for the season) the wind will be N., if high, from S.
Lightning only	When the mercury is low, the storm being beyond the horizon.
Fine weather	With a rosy sky at sunset.
Wind and rain	When the sky has a sickly greenish hue.
Rain	When the clouds are of a dark Indian red.
Bad weather or much wind	When the sky is red in the morning.

EXPLANATORY CARD.
BY THE LATE VICE-ADMIRAL FITZROY, F.R.S., ETC.
WEATHER GLASSES.
The Barometer Rises		The Barometer Falls
for Northerly wind		for Southerly wind
(including from North-west, by the North, to the Eastward),		(including from South-east, by the South, to the Westward),
for dry, or less wet weather,—for less wind,—or for more than one of these changes:—		for wet weather,—for stronger wind,—or for more than one of these changes:—
Except on a few occasions when rain, hail, or snow comes from the Northward with strong wind.		Except on a few occasions when moderate wind with rain (or snow) comes from the Northward.

For change of wind toward Northerly directions,—		For change of wind toward Southerly directions,—
a thermometer falls.		a thermometer rises.
Moisture or dampness in the air (shown by a Hygrometer) increases before rain, fog, or dew.

On barometer scales the following contractions may be useful:—		Add one-tenth of an inch to the observed height for each hundred feet the Barometer is above the half-tide level.
RISE	FALL
FOR	FOR	The average height of the Barometer, in England, at the sea-level, is about 29·94 inches; and the average temperature of air is nearly 50 degrees (London latitude).
NORTH	SOUTH
N.W.—N.—E.	S.E.—S.—W.
DRY	WET	The Thermometer falls about one degree for each three hundred feet of elevation from the ground, but varies with wind.
OR	OR
LESS	MORE
WIND.	WIND.	“When the wind shifts against the sun,
		Trust it not, for back it will run.”

EXCEPT	EXCEPT	First rise after very low
		Indicates a stronger blow.
WET FROM	WET FROM
NORTH.	NORTH.	Long foretold—long last,
		Short notice—soon past.
(In South Latitude read South for North.)