(22) 
Constant attention to the labels of the plants reduces the mis- 
placement of these important adjuncts to an exhibit to a 
minimum. 
Propagating Houses 
The propagating houses were maintained with only unim- 
portant repairs. An area of 2,500 square feet immediately 
south of the propagating houses has been enclosed with wire 
netting eight feet in height, to protect the experimental cul- 
tures for the study of the origin of species that have been in 
progress for some time. 
Power Plant 
The heating and power plant has been maintained with a 
minimum of repairs. Only one break in the heating system 
has occurred, and this necessitated cutting off the steam from 
the museum for two days only. The trouble was due to a 
defective joint in the main and was put in order at slight 
expense. 
During the summer the entire system was overhauled by 
the chief engineer, a number of frames and grate bars being 
replaced under the boilers. The certificate given by the 
manager of the inspection department of the United States 
Casualty Company, after the annual inspection, was accom- 
panied by a letter stating that the entire power plant with its 
boilers, pumps, dynamos and other machinery were in ex- 
cellent condition and showed unusually good care and in- 
telligent handling. 
Stable 
The stable now furnishes accomodations for ten horses, and 
has been kept in order by the replacement of some of the floors 
and of the sloping approaches at the entrances. 
Repair Shop 
The repair shop has well repaid its maintainance. One 
man has been able to keep the tools and implements of the 
laborers and mechanics in order and to execute other simple 
repairs. It is still necessary to have horse-shoeing and re- 
