Liielligence and MisceUa?ieous Articles. 397 



becoming solid ; whereas the bromide is rendered solid at about 10° 

 Fahr. 



The details now given on the bromide of silicium, independently of 

 the new facts which they disclose, naturally indicate what remains to 

 be done in order to complete the history of the bromides of the same 

 kind, and which are unknown to us. 



M. Darcet, jun. has mentioned the existence of a bromide of alu- 

 minum, the properties of which nearly resemble those of chloride of 

 aluminum : it is, however, very probable that they differ, if it be 

 merelv in the boiling point, seeing the enormous difl'erence which 

 exists between the chloride and bromide of silicium in this respect. 



Bromide of magnes'-um may be obtained in the same mode as the 

 bromide of silicium, by mixing intimately charcoal, carbonate of mag- 

 nesia, &c. ; but it is difficult to obtain it perfectly pure, because it is 

 not volatile, and requires a red heat to fuse it. It is a whitish mass 

 of a crystalline appearance, which powerfully attracts moisture from 

 the air, and dissolves in water with heat and noise. — Ann. de Chim. et 

 de Phijs. vol. xlviii. p. 87. 



DESTRUCTION OF FRESH-WATER FISH BY THE ADMISSION OF 

 THE SEA INTO A LAKE. 

 The following particulars of the phenomena attending the open- 

 ing of Lake Lotliing, at Lowestoft, to the sea, when sea-borne vessels 

 were first received into the new harbour at that place, on the 3rd 

 of June last, may prove of interest in geology : they are extracted 

 from the East Anglian newspaper of .June 7th, 1831. "Some of 

 the circumstances attending the junction of the salt and fresh waters, 

 in the first instance, are remarkable. The salt water entered the 

 lake with a strong under-current, the fresh water running out at 

 the same time to the sea upon tiie surface. The fresh water of the 

 lake was raised to the top by the irruption of the salt water beneath, 

 and an immense quantity of yeast-like scum rose to the surface of 

 the lake. The entire body of the water in the lake was elevated 

 above its former level ; and on putting a pole down, a strong under- 

 current could be felt bearing it from the sea ; and at a short distance 

 from the lock next the lake, there was a perceptible and clearly 

 defined line where the salt water and the fresh met, the former 

 rushing under the latter ; and upon this line salt water might have 

 been taken up in one hand, and fresh water in the other. 



" The consequences of the admission of the briny waters have been 

 fatal to thousands of the former inhabitants of the peaceful lake. 

 On Wednesday and Thursday last its surface was thickly studded 

 with the bodies of pike, carp, perch, bream, roach, and dace, mul- 

 titudes of which were carried into the ocean and thrown afterwards 

 upon the beach ; most of them having been bitten in two by the 

 dog-fish, which abound in the bay. It is a singular fact, that a pike of 

 about '.:0 pounds weight was taken up dead near the Mutford end of 

 the Lake ; and on opening the stomach, a herring was found in it 

 entire. The waters of the lake exhibited the phosphorescent light 

 peculiar to sea water on the second or third night after the opening." 



ERRORS 



