By Professor Lindley. 



241 



plant, were killed. No one could have suspected that this would 

 happen ; it was necessary to ascertain the fact experimentally. 



There is no doubt, that if this kind of investigation were prose- 

 cuted with sufficient care, and for a series of years, many plants not 

 now reputed to be hardy would be added to our outdoor gardens. 

 It will be seen that Hamelia patens, a West Indian plant, lived for 

 several years at Claremont ; Peganum Harmala, a native of the hot 

 plains of Syria, survived over last winter at Cambridge, and it will 

 be one of the objects of another part of this paper to point out many 

 similar cases. It is not, however, in a casual report of this descrip- 

 tion that so extensive a subject can be properly treated, all that is 

 now proposed, is to call attention to certain facts which appear to 

 be important. 



In order to save space, and moreover for the sake of contrasting 

 the effects of different degrees of cold upon particular species, a part 

 of the observations has been thrown into the following tabular 

 form ; the remainder will be given geographically. In the table, 

 the stations at which the observations were made are arranged ac- 

 cording to the amount of cold actually experienced, as nearly as 1 

 have been able to ascertain it ; but as I entertain no doubt that 

 the temperature was really lower in some cases than that actually 

 observed, the proximity of the columns of observations is not exactly 

 determined by the amount of cold recorded by the several ob- 

 servers. For the sake of convenience, and for the purpose of 

 economizing space, the following signs have been employed instead 

 of words to express the amount of injury actually sustained : — 

 [• indicates that a plant has been entirely killed, or so nearly 

 so that it was not worth preserving ; » that it was much injured, 

 but not killed ; o that it was uninjured, or hurt in no consi- 

 derable degree.] 



