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POPULAR SCIENCE MONTHLY 



assorted and reserve material of all kinds is kept in the nurseries on 

 the eastern slope of the same ridge; the salicetum is established on 

 the border of the marsh in the northern end of the Garden, giving 

 the willows and poplars the conditions under which they grow best. 

 The fruticetum occupies an adjoining upland plain underlaid with 

 gravel to a depth of twenty feet, affording space for the cultivation of 

 a large number of shrubs, while the conifers are located on slopes 

 to the westward of the hemlock forest. The viticetum is along the 

 western edge of the forest, and the trellises of logs and timbers, ex- 

 tending for a length of six hundred feet, give suitable support to the 



The Watekfai. 



vines. The herbaceous plantation occupies an open glade to the west- 

 ward of the forest, and lies between two granite ridges. It is traversed 

 through the middle by a small stream widened at places into lagoons for 

 aquatic forms. About twenty-two hundred species are now in cul- 

 tivation in this plantation. The wide border plantations which are 

 established along the boundaries also offer opportunities for the growth 

 of a great variety of trees, herbs and shrubs. 



The horticultural houses, also erected by the City for the Garden, are 

 located in the western part of the grounds at some distance to the south 

 of, and facing, the museum. A palm-house, with a total height of dome 

 of ninety feet, is the central feature, from which lower ranges extend on 

 either side, making a total length of front of five hundred and twelve 

 feet. The horticultural houses, as well as the museum, are heated by 



