months.

_Curious Transcolorations._

Put half a table-spoonful of syrup of violets and three
table-spoonfuls of water into a glass; stir them well together with a
stick, and put half the mixture into another glass. If you add a few
drops of acid of vitriol into one of the glasses and stir it, it will
be changed into a crimson; put a few drops of fixed alkali dissolved
into the other glass, and when you stir it, it will change to green.
If you drop slowly into the green liquor, from the side of the glass,
a few drops of acid of vitriol, you will perceive crimson at the
bottom, purple in the middle, and green at the top; and by adding a
little fixed alkali dissolved, to the other glass, the same colours
will appear in different order.

_Another._

If you put a tea-spoonful of a liquor composed of copper infused in
acid of vitriol, into a glass, and add two or three table-spoonfuls of
water to it, there will be no sensible colour produced; but if you add
a little volatile alkali to it, and stir it, you will perceive a very
beautiful blue colour. Add a little acid of vitriol, the colour will
instantly disappear upon stirring it; and by adding a little fixed
alkali dissolved, it will return again.

_Another._

Put half a tea-spoonful of a liquor composed of iron infused in acid
of vitriol, into half a glass of water; and add a few drops of
phlogisticated alkali, and a beautiful Prussian blue will appear.

_Curious Account of the Electric Effects of a Russian Climate._

Mr. AEpinus in a letter to Dr. Guthrie, relates the following
phenomena, which took place in Russia, when a severe frost had
continued for several weeks.

Mr. AEpinus was sent for to the palace to see an uncommon phenomenon.
On going into the apartment of Prince Orloff, he found him at his
toilet, and that every time his valet drew the comb through his hair,
a strong crackling noise was heard; and on darkening the room, sparks
were seen following the comb in great abundance, while the prince
himself was so completely electrified, that strong sparks could be
drawn from his hands and face; nay, he was even electrified when he
was only powdered with a puff.

A few days after, he was witness to a more striking effect of the
electric state of a Russian atmosphere. The Grand Duke of Russia sent
for him one evening in the twilight, and told him, that having briskly
drawn a flannel cover off a green damask chair in his bed-chamber, he
was astoni