MISSOURI BOTANICAL GARDEN BULLETIN 3 
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ing cuttings. Two of these houses have been completed, and 
the material for the remainder of the range is on hand, so 
that it will be finished within the near future. The Garden 
is therefore, for the first time, equipped with the proper type 
of greenhouses for the growing of the immense amount of 
material necessary for the planting of the various outdoor gar- 
dens as well as for maintaining the permanent stock used 
during the winter in the floral display house. 
Additional Construction Work.—Another much-needed im- 
provement was the completion of the concrete heating tunnel 
carrying the 6-inch main from the principal tunnel to the 
valve chamber controlling the growing houses. This tunnel, 
about 6 feet wide, 7 feet high, and 175 feet long, enables one 
to immediately reach all the heating pipes on the system and 
affords a considerable saving in heat over the old condition 
when the pipes were buried in the ground and there was no 
means of promptly repairing leaks. 
Other additions include the new trellises for the rose gar- 
den, the construction of a brick walk through the pergola, a 
start towards the building of the walk from the pergola to 
the economic garden as well as putting in the foundation 
and necessary culverts for the walk back of the pergola 
through the projected wild flower garden, the repainting of 
the interior of the office building and Cleveland Avenue 
house, painting of the Director’s residence, the old Shaw resi- 
dence and the Linnean house, besides an unusual amount of 
general repair and painting work throughout the Garden. 
Some New Features-—A new garden, known as the test 
garden, has been established just west of the office building. 
During the season of 1919 about 200 varieties of plants were 
grown here, with the idea of being able to show to those in- 
terested novelties and new varieties obtained through the 
catalogues of seedsmen and other sources. Aside from afford- 
ing an opportunity for the public to judge of the merits of 
these plants, it furnishes a demonstration of the adaptability 
of the new forms to St. Louis conditions, and it is believed 
that a continuation of these tests will not only serve a useful 
purpose for the amateur, but will also enable the Garden to 
gradually select from the new varieties of flowering plants 
some which may be used to advantage in its own plantations. 
A start has also been made towards another outdoor gar- 
den long contemplated, namely, the wild flower collection 
back of the pergola. The natural conditions here are admir- 
ably suited for growing native wild flowers, and during the 
