4. Apports: that is to say, the sudden appearance of objects—flowers, sweets, stones, etc.—which have not been brought by any of the assistants. This phenomenon—if it exists—supposes, in addition, the following:—
5. Penetrability, or the passage of matter through matter.
6. Visual phenomena, which are themselves subdivided into:—
- (a) Vision of the odic effluvium.
- (b) Amorphous lights.
- (c) Forms, either luminous or non-luminous.
- (d) Lastly, the most complete phenomenon of all—the materialisation of a form, human or otherwise, luminous or not.
7. Phenomena which leave permanent traces, such as imprints.
8. Alteration in the weight of material objects or of certain people: levitation.
9. Perceptible changes in the temperature: sensation of cold or heat; spontaneous combustion.
10. Cool breezes.
Such are the chief psychical phenomena of the material order, which have been pointed out by different experimenters. I have not verified all of them: raps, telekinetic, and a few luminous phenomena are all I have obtained in a thoroughly satisfactory manner.