372 Scientific InteUigence. — Zoology. 



of very considerable importance in a commercial point of view. 

 Vast quantities are brought from the country to London, and 

 other great towns. Since the peace they have also been 

 largely imported from the continent. At this moment, indeed, 

 the trade in eggs forms a considerable branch of our commerce 

 with France, and affords constant employment for a number of 

 small vessels. It appears from official statements, that the eggs 

 imported from France amount to about 60,000,000 a-year ; and 

 supposing them to cost, at an average, 4d. per dozen, it follows 

 that the people of the metropolis and Brighton (for it is into 

 ' them that almost all are imported), pay the French above 

 L. 83,000 a-year for eggs ; and supposing that the freight, im- 

 porter's and retailer's profit, duty, &c. raise their price to the 

 consumer to lOd. per dozen, their total cost will be L. 213,000. 

 The duty in 1829 amounted to L.22,189.--lf«cCwZfoc^'5 Com- 

 mercial Dictionary. [About fifteen years ago the number of 

 eggs exported from Berwick-upon-Tweed to London amounted 

 to L. 30,000 worth a-year,] — Edinburgh Agricultural Journals 

 7. Destruction of Fresh-water Fish by the admission of the 

 Sea into a Lake. — The following particulars of the phenomena 

 attending the opening of Lake Lothing at Lowestoft to the Sea, 

 where sea-borne vessels were first received into the new harbour 

 at that place on the 3d of June last, may prove of interest in 

 natural history. They are extracted from the East Anglian 

 Newspaper of June 7. 1831. Some of the circumstances at- 

 tending the junction of the salt and fresh waters in the first in- 

 stance 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 the surface. The fresh-water of the lake 

 was raised to the top by the eruption 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 ele- 

 vated 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 loch, next the lake, there was a per- 

 ceptible 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 

 in the other. The consequences of the admission of the briny 

 waters have been fatal to thousands of the former inhabitants of 



