(475) 
sing the relation between the magnitude of burden and the sensation 
of weight. | 
How now for the other senses? A palpable fact tending to prove 
as for the sense of weight, the existence of an asymptote, is not 
known hitherto. Here thas we shall have to try to find an indirect 
proof. This latter too cannot easily be furnished. A few indica- 
tions however we may be enabled to find. To that purpose we 
will consider in the first place in what manner we may deduce from 
our law an expression for the absolute and relative „Unterschied- 
schwelle’. We proceed therefore in forming from: 
E= A{1—¢-8(R-»)} 
the differential quotient: 
1 
BRIE DAN awe ay Gs ate HLO) 
AB 
Passing from the differential to the difference we obtain: 
Ardi eB(R—O) A EB e . . . . . (11) 
AB . 
and as, according to FrCHNER, the value A Z, the so-called minimum 
differential sensation, is constant, the formula stands: 
as eee Sh Miva OE A 8 12) 
and putting 4; . e—-?¢= hk: 
ee Wd Toe tae om Sees Ma rt ORS 
By this process we have calculated the value of the absolute 
differential threshold-value for each value of R. 
For the relative differential threshold-value we find: 
ME, eBR 
yes ane 
ge |) aa 
