Sir G. S. Mackenzie on certain Points in Meteorology, 355 



the ocean towards the south ; — that at a subsequent period an 

 irruption of the North Sea took place, forming an estuary 

 across Norfolk ; its eastern line running from Cromer towards 

 Lowestoft, and from thence across to Belgium, and its western 

 from Weybourn, by Norwich, Bungay, Ipswich, and a part of 

 Essex, thus communicating with the Paris basin. That the 

 Suffolk beds were deposited before the Norfolk, I conclude 

 from the analogy the former bear to those of the Paris de- 

 posit, and the latter bearing a greater specific relation to the 

 recent Testacea*. The fact of the numher of mammalian re- 

 mains found eastward of the estuary thus laid down, even in 

 the bed of the German Ocean, is considered by most as suffi- 

 cient evidence that it was once dry land ; and that its western 

 border was near the line pointed out, may be affirmed by the 

 number of mammalian remains found imbedded with the 

 littoral rejectamenta. The fine grinder of the mastodon fi- 

 gured by Smith in his " Strata Identified," was found at 

 Witlingham : I have a fragment of another which I found at 

 Bramerton ; and recently portions of two other grinders have 

 been found in that locality. Of the elephant I have fre- 

 quently met with fragments of its tusks ; but not of its grind- 

 ersj until this year, when on a visit to the Thorpe pit, I found 

 a large grinder, of thirteen lamina?, thirteen inches long and 

 five across the grinding surface. Some bones have also been 

 found in Bramerton, as an astragalus, vertebra, &c. Bones of 

 the ox, and horns and teeth of the deer have been repeatedly 

 found in this deposit. 



I am, Gentlemen, yours, &c. 



Norwich, Aug. 15, 1835. Samuel Woodward. 



XLI. On certain Points in Meteorology and Magnetism. 

 By Sir G. S. Mackenzie, Bart., F.R.SS. L. $E. 9 $c. 



To the Editors of the Philosophical Magazine and Journal. 



Gentlemen, 



A S there have been marked changes in our climate within 

 **"*- a few years, it is desirable that every observation which 

 has apparent importance should be recorded, and the atten- 

 tion of meteorologists called to it. I have made one that 



* This opinion was submitted to the Geological Society through Dr. 

 Fitton in 1825, and is noticed in their Proceedings, vol. i. p. 93. [A notice 

 of Mr. Woodward's paper will also be found in Phil. Mag. and Annals, 

 N.S., vol. v. p. 140.— Edit.] 



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