260 W. Crookes— Radiant Matter. 
Whether the gas originally under experiment be hydrogen, 
carbonic acid, or atmospheric air, the phenomena of phosphor- 
escence, shadows, magnetic deflection, etc., are identical, only 
they commence at different pressures. Other facts however, 
show that at this low density the molecules retain their chemi- 
cal characteristics. Thus by introducing into the tubes appro- 
priate absorbents of residual gas, I can see that chemical 
attraction goes on long after the attenuation has reached the 
best stage for showing the phenomena now under illustration, 
and I am able by this means to carry the exhaustion to muc 
OAOOAAANA AAARAAH 
number quite sufficient to justi ; ing of the 
°F ee 
‘O Suggest some idea of this vast number I take the ex 
= bulb, and perforate it by a spark from the induction 
po spark produces a hole of microscopical fineness, yet 
to allow molecules to penetrate and to destroy the 
