— 45 
THE WORLD’s FAIRS 
POSTSCRIPT. 
The foregoing letters were pub- 
lished vvith the desire Io establish the 
faot, that exhibition matters have ar- 
rived at that stage of developement, 
when it becomes possible to speak of 
the existence of an exhibition science. 
An exhibition science with its own 
peculiar principles, like any other 
science, oannot fail to bring practice 
to theoretical consciousness on those 
points in which the necessity of re- 
form has made itself feit in our past 
experience. 
Exhibitions are a subject. parti- 
cularly adapted for the work of inter 
national congresses, for all countries 
have accepted them, as one of the best 
means of furthering the intellectual, 
moral and physical improvemont of 
the population.