333 
that the most useful results are obtained by arranging this 
museum by the products themselves, and thus not in biologic 
sequence, but by bringing together all drugs, all fibres, all woods, 
all resins; where the same product is used in more than one in- 
dustry the exhibit may be duplicated, more or less modified, with- 
out disadvantage. 
The investigation of economic plants and their products is ac- 
complished through the Scientific Department, and few valuable 
results can be reached unless the scientific equipment is well de- 
veloped. The two departments must work conjointly, both on 
account of the necessity of knowing just what species is under in- 
vestigation, its structure, distribution and literature, and in order 
that the most approved and exact methods may be used in the 
research. Any idea that the scientific element can be dispensed 
with in connection with economic studies is palpably untenable. 
Teaching and research in agriculture, pomology and plant 
pathology are so well organized in America, through our National 
Department of Agriculture and our numerous agricultural colleges 
and schools, that there is no great necessity for providing elaborate 
€quipments for those branches in botanical gardens. But in case 
the endowment of a garden were sufficiently large to enable them 
to be successfully prosecuted, in addition to more necessary work, 
there can be no doubt that important additions to knowledge 
would be obtained. On the other hand, no such liberal allowances 
have been made with us for forestry or pharmacognosy, and re- 
Search and instruction in these sciences must prove of the greatest 
benefit to the country. 
The Aesthetic Element.—The buildings, roads, paths and plant- 
ing of a botanical garden should be constructed and arranged with 
reference to tasteful and decorative landscape effect. The possi- 
bilities of treatment will depend largely upon the topographical 
character of the area selected and the natural vegetation of the 
tract. The buildings required are: A fire-proof structure or struc- 
tures for museum, herbarium, libraries, laboratories and offices ; a 
glass house with compartments kept at several different tempera- 
tures for exhibition, propagation and experimentation, or several 
Separate glass houses; and to these will usually be added dwelling 
houses for some of the officers, a stable and other minor buildings. 
