19 
Height of stack as built, from boiler room roof ............. 30 ft. 6 in. 
Height of stack as raised, from boiler room floor ........... 69 ft. 8 in. 
Height of stack as raised, from boiler room roof ............ so ft. 2 in. 
This work was completed on January 21, 1914. 
Plant Houses 
Economic House.—The construction of the cement water tank, 
the stone bridge and steps, and the valley and stream in the larger, 
central house, in accordance with designs prepared by the Pierson 
U-Bar Company, and approved by the Committee on Botanic Gar- 
den, were completed during the first week in May. The house has 
hitherto been commonly called the “ Palm House,” but in harmony 
with the plan to devote it to an exhibit of useful plants of the 
tropics, it will hereafter be designated as the “economic house.” 
Defects in Original Construction Corrected—Up to December, 
1914, the plant houses had never been put into entirely satisfactory 
condition by the contractors. The floor of house No. 1, which is 
over the potting room, was never water-tight, as specified, with 
the result that the potting room was never comfortable; for a part 
of the past year it has not been possible to use it at all on account 
of the leakage of water from above. The matter has finally been 
satisfactorily remedied under the supervision of the architects. 
The economic house apparently sagged continually after it was 
built, and the stresses and strains resulting have caused a very 
considerable breakage of glass. Careful inspection by the archi- 
tects and contractors disclosed the fact that the superstructure 
had settled at least four inches since it was finished. This defect 
has now been remedied, and the structure strengthened by four 
upright supports of steel tubes. Fortunately these supports do not 
appreciably detract from the good appearance of the interior. 
Grounds 
New Addition—On August 17, 1914, an agreement* was en- 
tered into between the City of New York and the Brooklyn In- 
stitute of Arts and Sciences, amending the agreement of Sep- 
tember 9, 1912, which amended that of December 28, 1909, and 
* See Appendix 8. 
