The Book of ceremonial Magic

An experiment of speaking with spirits or conjuring them should be operated in the day
and hour of Mercury, which hour may be the first or the eighth, but the fifteenth or
twenty-second of the same night will be still better, for spirits appear more easily in the
silence of the dark hours. A certain atmospheric condition is also required for the
experiment of calling spirits, and an obscure uninhabited place congruous to such an art
is even more necessary, for so only will it be accomplished and educed. But if the
experiment be concerned with a theft, 1 it should be performed in the hour of the Moon
and on her day--if it be possible, in the crescent Moon--from the first to the eighth hour,
or, failing this, at ten o'clock in the night. It is better, however, in the day, because the
light has more correspondence
p. 183
to the intention, that is, to the manifestation of hidden things. The experience of
invisibility 1 should be operated when the Moon is in Pisces. Experiments of love, favour
and grace 2 should be accomplished on the day and in the hour of the Sun or Venus, from
the first to the eighth hour, with the Moon in Pisces. Works of destruction, hatred and
desolation 3 should be performed on the day and in the hour of Saturn, from the first or
eighth to the fifteenth or twenty-second hour of the night; they are then certain. Burlesque
and amusing experiments are performed on the day of Venus, in the first and the eighth
hour, or in the fifteenth and twenty-second hour of the night. Extraordinary experiences
should be operated in corresponding hours on the day of Jupiter. 4