This page has been validated.
SPECTROPIA;
OR,
SURPRISING SPECTRAL ILLUSIONS.
SHOWING
GHOSTS EVERYWHERE,
AND OF ANY COLOUR.
WITH SIXTEEN ILLUSTRATIONS.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Rule_Segment_-_Span_-_20px.svg/20px-Rule_Segment_-_Span_-_20px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Rule_Segment_-_Span_-_20px.svg/20px-Rule_Segment_-_Span_-_20px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Rule_Segment_-_Diamond_-_6px.svg/7px-Rule_Segment_-_Diamond_-_6px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/45/Rule_Segment_-_Span_-_10px.svg/10px-Rule_Segment_-_Span_-_10px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Rule_Segment_-_Diamond_-_10px.svg/11px-Rule_Segment_-_Diamond_-_10px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/45/Rule_Segment_-_Span_-_10px.svg/10px-Rule_Segment_-_Span_-_10px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Rule_Segment_-_Diamond_-_6px.svg/7px-Rule_Segment_-_Diamond_-_6px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Rule_Segment_-_Span_-_20px.svg/20px-Rule_Segment_-_Span_-_20px.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Rule_Segment_-_Span_-_20px.svg/20px-Rule_Segment_-_Span_-_20px.svg.png)
NEW YORK:
PUBLISHED BY JAMES G. GREGORY.
No. 540 BROADWAY.
MDCCCLXIV.
SPECTROPIA;
OR,
SURPRISING SPECTRAL ILLUSIONS.
SHOWING
GHOSTS EVERYWHERE,
AND OF ANY COLOUR.
WITH SIXTEEN ILLUSTRATIONS.
NEW YORK:
PUBLISHED BY JAMES G. GREGORY.
No. 540 BROADWAY.
MDCCCLXIV.