598 FOREST CULTURE AND 
turbed, its means scattered, or its collections imper- - 
illed. It requires much watchful toil and research to 
bring together the material for large instructive col- 
lections, which, if even only in part sacrificed, cannot 
be completed again without both laborious care and 
renewed expenditure. 
Here in this hall I would ask, is it not the artisan 
who is specially interested in such collections? But 
the efforts to furnish or extend such means of teach- 
ing should not be ennarrowed by bondage, nor be dis- 
couraged by want of appreciation and sympathy. 
To exemplify yet somewhat more the duties which 
devolve ona botanic garden, for attaining the various 
objects set forth, it may be instanced that its admin- 
istrator must be extensively acquainted with the 
known vegetation of every part of the globe; he is 
thereby enabled, in his scientific relation to corres- 
pondents in all civilized countries, to secure by inter- 
change or otherwise additional treasures for the insti- 
tution intrusted to his care, and he is thus armed 
with the capability of recognizing the real value and 
significance of the riches which in his institution are 
already accumulated. He further must be conversant 
with the nature of his new acquisitions, to assign to 
them their scientific place in his collections, to identi- 
fy them for ascertaining their names and properties, 
and to provide for them the varied requisites for their 
culture, which he alone ean fully understand. Only 
by long professional studies, which qualify for the ad- 
ministration of a scientific garden, is it rendered pos- 
sible to discriminate between the known and unknown, 
to record new physiologic facts, to cireumscribe addi-- 
tional genera and species, to trace out novel qualities, 
