366 Regisier of the Weather in Plymouth. [Nov. 
examine the Snowdon and Cader Idris chains deliberately might 
easily determine this point with respect to both of them. 
If it should turn out as I suspect, that the porphyry and clay- 
slate are conformable, the whole mountainous tract of North Wales 
must be considered as a transition country; for the former rock on 
Snowdon, and in other parts of the chain, abounds in organic re- 
mains. 1 found on the highest summit numerous impressions of 
shells, which appeared to be pectenites and terebratulites. There 
were several impressions of organic bodies, which I have not seen 
described, and some appearances resembling, though indistinctly, 
turbinated madrepores.. I observed similar ‘impressions on some 
blocks near Lake Ogwen. 
If the Snowdon chain be not primitive, there is no part of North 
Wales which can with any degree of probability be referred to that 
formation. 
I remain, Sir, your obedient servant, : 
Bristol, Sept. 15, 1815. I, C. Pricnarp. 
ARTICLE Y. 
Register of the Weather im Plymouth for the first Six Months of 
1815. By James Fos, jun. Esq. With a Plate. 
JANUARY. 
Wind Rain. Observations, v 
0 . 
N Fair morn; cloudy eve. ~ 
NNW to E Cloudy and fair. me 
E Ditto; fair at night. 
ENE Ditto morn ; cloudy and fair afterno 
ENEtoN Fair. 
ENE Cloudy and fair. 
NNW Fog morn ; occasional showers. 
NW 0-26 Snow showers. 
Eto WNW a Fog morn; cloudy day ; showers at 
WNW Showers early in morn; cloudy day. 
NW } 0-10 Slight showers. 
NW Hail ditto, morn; fair afternoon. 
is|\WSW to WN W } 0-16 { Misty day. 
N Showers, morn; cloudy and fair aftern,, 
FE Cloudy morn ; fair afternoon, 
NNW Cloudy and fair. # 
NNE Hoar frost ; cloudy morn; fair day. i] 
NNE Ditto; cloudy and fair, ; 
NE Snow showe 
N Ditto. i u 
NE Fair morn; cloudy eve. u 
N Cloudy morn; cloudy and fair eve. 
N Snow showers, morn ; cloudy and fair 
Eto ESE 0-02 Cloudy, anda shower, 
2s 
3} 
iSnow showers, 
