53 



country where, on the contrary, the weather is so constantly 

 unsettled. 



The plants, however, grew here with remarkable vigour, 

 and considerably exceeded the size attained in their native 

 country. This was especiallj^ the case with HelichrysuTri 

 bradeatum, and from a large proportion of these plants 

 having flower -heads of the original wild form or only 

 slightly altered, it was inferred that they were the produce 

 of a recent importation of seed. 



Mr. SiNGTON made the following remarks with respect to 

 a specimen he exhibited of Mineral deposit, occurring at 

 Windy Knoll, near Castleton. 



This deposit is exposed on the top of a small isolated hill, 

 in the face of a quarry, near Castleton. It is specially 

 noticeable on account of the peculiarity of its position and 

 its chemical constitution, which has not, as yet, been defi- 

 nitely ascertained. There are specimens in the mineralogical 

 museums of several Continental Universities. The entire 

 deposit occupies a space of about one cubic yard, in a slight 

 hollow on the hill top, filled up with fragments of limestone 

 and quartz, the spaces between which are occupied with the 

 mineral. When freed by means of benzine from the im- 

 purities with which it is mixed, it is found to consist of a 

 bright yellow jelly-like body. The limestone in contact 

 with it has been saturated with the mineral, and has been 

 changed to a black colour ; they can be separated by boiling 

 in a suitable solvent. Quartz is not affected by the mineral. 

 It is insoluble in water. 



