184 



Dr. Berger on the physical Slructitre 



Names of Places. 



Heights in feet above the 

 level of the sea. 



KithillTop . . . 

 Launceston . . . 

 The Jsmaica Inn, Bod- 

 min Downs 

 Bodmin .... 

 Indian Queen . . . 

 St. Stephen's Church . 

 Granitic Mountain- 

 plain, near theChina 

 pits ..... 

 Menachan .... 

 St. Kcvern's Church . 

 Mullyon C.'iurchTowi 

 Trcgoniiig-hill, Signal- 

 house . . 

 St Michael's Mount . 

 Buryan .... 



Sennen 



Mean CliiT, parish of 

 Sennen .... 

 Cape Cornwall 

 St. Just Church Town 

 Highest point in the 

 , road between St. 

 Just and Zcnnor, 

 near Mean Screcfis 

 Redruth, CJray's hotel' 

 Carn Brea 



Counting - house at 

 Dolcoath .■ . . 



R-edruth Church Par- 

 sonage . . . . 

 Carn Marth . . . 

 Scoj^rier House . . 

 St. j(\gnes' Beacon 



By the 

 Barometer. 



942 

 5S1 



By the trigono- 

 metrical mea- 

 surement ofLt, 

 Col. Mudge. 



825 

 188 

 491 



830 

 li53 

 213 

 280 



548 

 231 

 467 

 391 



188 

 229 

 404 



623 

 414 

 697 



372 



350 

 819 

 377 

 6S1 



519 



387 



021 



The weatlicr was very variable on 

 this day, and the only correspond- 

 ent observation by (he sea side 

 that I had was the arithmetical 

 mean between two, made at the 

 distance of several hoars from 

 the time of my observation on 

 Kithill. I am therefore inclined 

 to think, that the trigonometri- 

 cal measurement is in this in- 

 stance most to be relied ou. 



2 40 Maton's Observ. on the "West- 

 ern Counties, vol. i. p. 195. I 

 do not know whether it was by 

 the plumb-line, or by what other 

 j)rocess, that this result was ob- 

 tained. 



Mean of nine Observations. 



Mean of two Observations. SCO 

 Klaproth's Min. Observ. p. 27. 



Mean of two Observations. 



In this instance, the simple method, 

 that is to say, the difference alone of the logarithms of numbers which express 

 the heights of the barometer at each station (six hundred and sixteen feet), is 

 more correct, or at least comes nearer to the trigouometrical measurement, tlian 

 the method with the corrections. 



N. B. The comparative experiment on the sea shore, and on St. Agnes' Boacon, were 

 carefully made, there was a very short interval between each, ai\d the observations 

 were made in a line nearly vertical, between two and three o'cloclt, in the after- 

 noon. 



