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other ferns too large for house 10, and the main collection 
of staghorn ferns, which are hanging from the roof. Speci- 
mens of aroid vines will also be found on the walls. 
The graceful tree-ferns inhabit mostly the mountains of 
the tropics, commonly at an elevation of 1500 feet or more. 
Some of the plants have been secured by Garden expedi- 
tions to different parts of the American tropics. Sus- 
pended from the roof, in addition to the staghorn ferns, are 
other desirable ferns. 
House No. 20. This is the same size as house 16. It 
contains tree-ferns, and large specimens of other ferns, 
including some of Blechnum brasiliense. Here is a fern 
from China and Tartary, known as the Scythian Lamb 
(Cibotium Barometz), which is of interest as forming the 
basis of a marvellous tale, current in early times, to the 
effect that on a vast plain to the eastward of the Volga 
occurred a wonderful plant, looking like a lamb. This 
animal, so the story ran, was supported upon a stalk and 
as soon as it had exhausted the vegetation at hand died from 
starvation. There are also climbing ferns in this house. 
Aroid vines will be found on the walls. 
PoweER Houses 
Steam for heating conservatory range I is supplied from 
the power house, located near the New York Central 
Railroad just south of the zooth Street entrance and 
connected with the range by a subway about six hundred 
feet long containing the steam mains; five boilers are in- 
stalled and supply steam not only to the range, but also 
to the museum building through another subway about 
twelve hundred feet in length. 
Steam for heating conservatory range 2 is supplied from 
a boiler house near this structure, a little to the north. 
4, The Mansion 
This large stone house, situated on the high eastern bank 
of the Bronx River above the waterfall, came to the use 
