d long, round a poker,
then press with his thumbs and fingers the ends of the flannel into
his ears, while he swings the poker against an iron fender, he will
hear a sound very like that of a large church bell.

_To produce Metallic Lead from the Powder._

Take one ounce of red lead, and half a drachm of charcoal in powder,
incorporate them well in a mortar, and then fill the bowl of a
tobacco-pipe with the mixture. Submit it to an intense heat, in a
common fire, and when melted, pour it out upon a slab, and the result
will be metallic lead completely revived.

_To diversify the Colours of Flowers._

Fill a vessel of what size or shape you please, with good rich earth,
which has been dried and sifted in the sun, then plant in the same a
slip or branch of a plant bearing a white flower, (for such only can
be tinged,) and use no other water to water it with, but such as is
tinged with red, if you desire red flowers; with blue, if blue
flowers, &c. With this coloured water, water the plant twice a day,
morning and evening, and remove it into the house at night, so that it
drink not of the morning or evening dew for three weeks. You will then
experience, that it will produce flowers, not altogether tinctured
with that colour wherewith you watered it, but partly with that, and
partly with the natural.

_How far Sound travels in a Minute._

However it may be with regard to the theories of sound, experience has
taught us, that it travels at about the rate of 1142 feet in a second,
or nearly thirteen miles in a minute. The method of calculating its
progress is easily made known: when a gun is discharged at a distance,
we see the fire long before we hear the sound; if, then, we know the
distance of the place, and know the time of the interval between our
first seeing the fire, and then hearing the report, this will show us
exactly the time the sound has been travelling to us. For instance, if
the gun be discharged a mile off, the moment the flash is seen I take
a watch and count the seconds till I hear the sound; the number of
seconds is the time the sound has been travelling a mile.

_Easy Method of making a Rain Gauge._

A very simple rain gauge, and one which will answer all practical
purposes, consists of a copper funnel the area of whose opening is
exactly ten square inches: this funnel is fixed in a bottle, and the
quantity of rain caught is ascertained by multiplying the weight in
ounces by 173, which gi