82 Notes of an Enquiry into the (January, © 
have come under my notice, proceeding from the simple to — 
the more complex, and briefly giving under each heading an 
outline of some of the evidence I am prepared to bring 
forward. My readers will remember that, with the excep- 
tion of cases specially mentioned, the occurrences have 
taken place im my own house, in the light, and with only 
private friends present besides the medium. In the con- 
templated volume I propose to give in full detail the tests 
and precautions adopted on each occasion, with names of — 
witnesses. I only briefly allude to them in this article. 
Crass a: 
The Movement of Heavy Bodies with Contact, but without 
Mechanical Exertion. 
This is one of the simplest forms of the phenomena observed. 
It varies in degree from a quivering or vibration of the room 
and its contents to the actual rising into the air of a heavy 
body when the hand is placed on it. The retort is obvious 
that if people are touching a thing when it moves, they 
push it, or pull it, or lift it; I have proved experimentally 
that this is not the case in numerous instances, but as 
a matter of evidence I attach little importance to this class 
of phenomena by itself, and only mention them as a pre- 
liminary to other movements of the same kind, but without 
contact. 
These movements (and indeed I may say the same of 
every kind of phenomenon) are generally preceded by a 
peculiar cold air, sometimes amounting to a decided wind. 
I have had sheets of paper blown about by it, and a ther- 
mometer lowered several degrees. On some occasions, 
which I will subsequently give more in detail, I have not 
detected any actual movement of the air, but the cold has 
been so intense that I could only compare it to that felt when 
the hand has been within a few inches of frozen mercury. 
Crass II. 
The Phenomena of Percussive and other Allied Sounds. 
The popular name of ‘“‘raps”’ conveys a very erroneous 
impression of this class of phenomena. At different times, 
during my experiments, I have heard delicate ticks, as with 
the point of a pin; a cascade of sharp sounds as from an 
induction coil in full work; detonations in the air; sharp 
metallic taps; a cracking like that heard when a fri¢tional 
machine is at work; sounds like scratching; the twittering 
as of a bird, &c. 
