590 . Dr. Daubeny on a certain Kind of 



in the analogous thermal spring of Digne in the Same depart- 

 ment. I met with it, as at the former locality, wherever the 

 water was allowed to drop upon the floor of the bath. 



When examined under Amici's microscope, it presented a 

 fibrous structure, the filaments being so interlaced as to form a 

 kind of netvA'ork. These filaments by a stronger magnifying 

 power exhibited the same appearance of tubes with granulations, 

 as those did from the former locality. 



Among the hot springs which are so abundant in the Py- 

 renees, I collected several samples of this same organic matter, 

 and remarked, that when the spring from which it had been 

 obtained was impregnated with sulphuretted hydrogen, the ap- 

 pearances approached those already described. 



Thus, at Aries in the departement des Pyrenees Orientales, 

 south of Perpignan, there occurs an abundant deposit of or- 

 ganic matter, which, examined through the microscope, pre- 

 sented a tubular structure, in which, however, the granulations 

 were not very distinguishable. 



At Barege, one of the most powerful of the sulphureous 

 springs, a substance is collected in the pipes and reservoirs 

 receiving the water, which seems to consist of a cluster of little 

 transparent irregular vesicles, having interspersed certain dark- 

 coloured roundish bodies, that appears like the same vesicles, 

 rendered opake by some kind of matter which fills their in- 

 terior. As, however, there were signs of decomposition in this 

 matter at the time when I was first enabled to submit it to the 

 microscope, I considered it useless to obtain a drawing of the 

 appearances it then presented, — and I allude to it at present, 

 only in order to establish the general position, that the glairy 

 or mucous-looking matter called baregine, which is met with in 

 so many warm sulphureous springs, derives its origin from the 

 growth of ConfervcE. 



This 



