1903.] STONEY—UNIVERSE OF REAL EXISTENCES. 135 
touch, another tekmerion, viz.: the perception of motion; or, at 
least, differ only from those autic causes which are capable of pro- 
ducing an actual perception of motion through those senses, in the 
way that the autic cause’ of the perception of one visible motion 
differs from the autic cause of the perception of a similar visible 
motion which is swifter or slower or on a different scale. 
These remarkable discoveries have led scientific men to entertain 
a new and very important view of nature, in which it is regarded 
as made up of objects each of which corsists of almost inconceivably 
minute and swift motions. These and the drifting about in space of 
some objects, 7.e., of some masses of internal motions, are the whole of 
this hypotheton. It may be regarded as the utmost simplification 
of which any synoptic view of the effects produced within the 
human mind by the mighty march of actual events in the real uni- 
verse is susceptible ; and it is therefore that synoptic view of those 
effects which stands in closest relation to the autic causes that have 
produced them. 
The remarkable hypothesis described in the last paragraph may 
appropriately be called the Diacrinominal Hypothesis, as it has dis- 
criminated between the various tekmeria produced within us by the 
autic universe, and has selected for further synthesis one special 
group—our perceptions of motion—on the ground that it, and that 
it alone, is able dy ztself and without being mixed up with other tek- 
meria to people Nature with objects which are complete as bodying 
forth in a collected form the information sent us by the real auta of 
the actual sense-compelling universe ; and which, owing to their 
simplicity, stand in a closer relation to those auta than the more * 
complex objects of Phenomenal Nature. Phenomenal objects are 
bright, warm, hard or soft, colored, sweet or bitter, and so on; as 
well as moving or at rest. In diacrinominal nature motions take 
the place of all these. An attempt was made to give a summary of 
the results of this hypothesis in a Friday Evening Discourse, deliv- 
ered before the Royal Institution of Great Britain in 1885, and 
printed in the Jowrna/ of that Society, so that it is the less to be 
regretted that it would make this paper too long to dilate upon 
them here. We may therefore pass at once to the consideration 
of the last circumstance which it seems necessary to make clear 
in order that we may be at length in a position to understand how 
the scientific study of objective Nature stands related to the real 
