The following Table, which gives some particulars respecting the Velocity of the Wind, was calculated by Mr. John Smeaton, the celebrated engineer, and is founded on a correct series of practical observations:Miles per hour. Feet per second.

1............ 1.47

2............ 2.93 ) Light airs.

3.:.......... 4.40 } Light airs

4............ 5.87 } Breeze.

5............ 7.33 } Breeze.

10............ 14.67 } Brisk gale

15............ 22. } Brisk gale.

20............ 29.34 } Fresh gale

25............ 36.67 } Fresh gale

30............ 40.01 } Strong gale

35............ 51.34 } Strong gale.

40............ 58.68 } Hard gale

45............ 66.01 } Hard gale.

50............ 73.35 }

60............ 88.02 } Strom.

80............117.36 } Hurricane, tearing

100............146.70 5 up trees, etc.

We conclude this chapter with a poetical enumeratioa of the benefits arising from the wind: "Of what important use to human kind,

To what great ends subservient, is the wind!

Where'er the aerial active vapour flies,

It drives the clouds, and ventilates the skies;

Sweeps from the earth infection's noxious train,

And swells to wholesome rage the sluggish main.

For should the sea unagitated stand,

Death, with huge strides, would desolate the land;

The scorching sun, with unpropitious beam,

Would give to grief an everlasting theme;

And baneful vapours, lurking in the veins,

Would fiercely burn with unabating pains.

Nor thus alone air purifies the seas.

O'er torrid climes it pours the healthful breeze:

Climes where the sun direct flings scorching day

Feel cooling air his sultry rage allay;

Unceasing goodness, with unceasing skill,

Educing certain good from seeming ill.

His guardian care extends o'er ev'ry shore,

And blends his favours with what men deplore '

The sable nations hence, and burning skies,

See luscious fruits in varying beauty rise;

Spontaneous Nature laugh at culture's toil,

And rich luxuriance bless the grateful soil.*