LIST OF THE PLATES.

PLATE I

This winged figure of Victory will give a white spectre by artificial light (rather green by daylight), the red wreaths green, the green roses red, and the orange stars blue.

PLATE II

This black figure will give a white spectre.

PLATE III

This will give a dark spectre.

PLATE IV

This green figure will give a red spectre.

PLATE V

And this red figure will give a green spectre.

PLATE VI

This orange figure will give a blue spectre.

PLATE VII

And this blue figure an orange spectre.

PLATE VIII

This purple hand will give a yellow spectre.

PLATE IX

And this yellow figure of Victory will give a purple spectre.

PLATE X

The face of this figure will come out green in the spectre, the garment red, and the cloud white.

PLATE XI

This black skeleton will make a white spectre.

PLATE XII

This skeleton will also give a white spectre, with a yellow mantle.

PLATE XIII

This figure and broom will give a yellow spectre, cloak and hat red, and moon white.

PLATE XIV

These figures will give green and yellow spectres.

PLATE XV

This Cupid will give a rose-coloured spectre, with bow and arrow yellow.

PLATE XVI

This is a rainbow with colours reversed, the spectre of which will be found a good resemblance of nature, especially when seen on a cloudy sky.

The colours of the spectres produced by these figures will not only be subject to a slight variation in different eyes, but also by the degree in which the plates are illuminated while being looked at.