artificial 14
its wonderful Nature 144
to guard against 153
Liquor that shines in the Dark 40
luminous 41
Luminaries, miraculous 89

Magic Lantern, Experiment with the 62
Glasses to paint 63
solar 60
Magnetism, Experiments in 70
Memory, artificial 158
Microscope, Experiment for the 145
Mirror, Magician's 124
perspective 124
distorting 126
oracular 152
Mirrors, magical 53
deforming 123
igniting 125
Money augmented by optical Illusion 15
melted in a Walnut-shell 40
Mortars, in Fire-works 184

Neptune in his Chariot 198
Number, to tell any, privately fixed on 45
without asking questions 45
divisible by 9, &c. 55
Numbers, to find the difference of two, &c. 56

Objects, three, discernible only with both Eyes 15
Oil upon Water, and Water upon Oil, curious Effects of 161
and Water, Experiments with 161
Opaque Bodies, seemingly transparent 121
Box made transparent 130
Opera-glass, diagonal 129
Oracle, inanimate 61
Orrery, magnetic 72
electrical