TWENTY-THIRD ANNUAL REPORT OF THE DIRECTOR. 17 
1903. An interesting fact shown by the appended diagram 
(C), presenting the seasonal distribution of week-day visi- 
tors, is that this year, for the first time, a characteristic 
falling off in the number of visitors for July does not 
appear. 
IMPROVEMENTS. 
One of the most important betterments of the Garden 
yet made has become possible this year through the co- 
operation of the City Sewer Department, the Commissioners 
of Tower Grove Park, the Trustees of the Garden and the 
owners of largely improved property lying to the south- 
west of the grounds, by which a new sewer district has been 
established and a connection made across the Garden pasture 
with the city sewer system. As a result of this, all of the 
sewage from this residence property, the Park, and the 
adjoining Garden has been diverted from the upper part 
of the brook that crosses the pasture and arboretum. At 
the same time, all of the foul water from the center of the 
Garden has been diverted from the lower brook into the 
Russell Avenue sewer, so that the brook will carry only 
storm water in the future,—a result long desired, but impos- 
sible without such provision as has now been made by the 
City. 
The first large undertaking in development of the Garden 
since the North American section was graded and planted 
ten years ago has been inaugurated this year by arranging 
for a large modern plant house conformed to the plans of 
the landscape architects of the Board. After a thorough 
investigation, supplemented by the study of competitive 
designs submitted by the largest American designers and 
builders of such houses, a contract hag been awarded to 
the Pierson U-Bar Company of New York for the construc- 
tion of a building 300 feet long, with a maximum height 
of 60 feet, divided into three compartments, in which 
tropical and subtropical vegetation may be planted with 
effective grouping. The plans provide also for two display- — 
wings in which chrysanthemums, azaleas, cinerarias, cal- 
