134 
MR. W. CROOKES ON REPELSION RESULTING FROM RADIATION. 
taken under somewhat similar circumstances to the curve in fig. 33 (480), a hot 
platinum wire being used as an internal source of radiation, which shows a still 
increasing power of repulsion up to as high an exhaustion as 0'4 millionths of an 
atmosphere. 
Eig. 33. 
In concluding this series of papers “ On Repulsion resulting from Radiation,” it is 
a pleasure for me to state that during the six years they have been in progress I 
have been materially aided by my assistant, Mr. C. H. Gimingham, whose extra¬ 
ordinary mechanical dexterity and skill in glass manipulation have been called almost 
daily into service. 
