r 
NATURAL SCIENCES OP PHILADELPHIA. 129 
HYDRANGEACEiE. 
Hydrangea. Though near the leak, as they were not in leaf, they sustained 
no injury. 
Adamia. Of several varieties in the hot-house, all were greatly injured. 
They suffered, not only in the loss of their fohage, but in the wood also, which 
had to be closely cut back. Their recovery was slow. 
Bauera were also severely affected. They lost all their leaves immediately, 
and recovered slowly. 
LYTHRACE^. 
CuPHEA. They were quick to lose all their leaves and flowers, their branches 
looked withered for a while, but they finally put forth on the old wood, 
RHAMNACEiB. 
Ceanothus divaricatus suffered the loss of all its foliage ; recovered gradually. 
CELASTRACE^. 
EtJ0NYMUS7^7n6r^a^a, although a plant of apparently hardy growth, was one of 
the first to suffer. Being near the leak it dropped every leaf immediately, and 
was long in recovering. 
APOCYNACEiE. 
Allamanda. Numerous large specimen plants of ^. cathartica, A. neriifolia, 
A. verticillata, A. grandiflora, A. Schottii, kc, were growing in the hot house. 
Every plant was seriously injured in the loss of wood-buds and leaves. Although 
their recovery seemed doubtful for some time, they slowly regained their 
foliage and former vigor. 
Arduina bispinosa, lost part of its leaves, but was not much injured. 
Alyxia lost all the foliage, and recovered again. 
ViNCA lost all their leaves and flowers — recovered. 
Plumieria rosea shed its foliage — recovered. 
Strophanthus lost their leaves and recovered. 
Beaumontia lost all their foliage and buds — recovered slowly. 
Rhyncospermum jasminoides was sensitive to the influence of the gas. It re- 
covered slowly after the total loss of leaves and flowers. 
EcHiTES Harrisii lost all its leaves, although growing in the orchid hoase- 
Had it been nearer the leak, it would no doubt have been killed. E. pieta.. 
although much nearer the leak, was not so sensibly affected. 
DiPLADENiA crassinoda was strongly affected, as was the case with D. uro- 
phylla. They lost their leaves and young branches. 
RouPELLiA recovered after the loss of all the foliage. 
GENTIANACE^, 
Chironia lost all their leaves and flowers, recovering very slowly. 
OLEACEJE. 
Olea fragrans was specially sensitive. Of numerous specimens in different 
parts of the house, all lost every leaf and flower, and were very slow in re- 
covering. 
SOLANACEiE. 
Brugmawsia Knightii sustained the immediate loss of all its foliage, and 
quickly recovered. 
1858.] 10 
