Barometric Ohservaiions, 



The rise of the Grand Junction Canal from the Thames "^ 

 at Brentford, to where the Paddington Canal joins f 

 it, is, according to Middleton's Agricultural Report of r 

 Middlesex . . . . • 'j 



-Ditto according to Gallon in Annals of Philosophy, 1 

 Vol. IX. page 179, and art. Canal Rees's Cyllopaediaj 



The Paddington Canal is level. 



The bottom of the sewer at the north end of\ , - , , j 

 Baker-street below the Paddington Canal j ^ ^ 



;The fall of the sewer from Baker-street to the'l 

 level of half flood in the Thames at North- j 

 umberland-strect, is, according to Mr. Ren- I 76 G 

 nie's Report in the First Report of the Com- [ 

 missionersof His Majesty's Woods, Forests, j 

 &c. p. 129, and 144, J 



The fall of the Regent's Canal is stated, in the 56th"l . 

 Vol. of the Philosophical Magazine, page 3 15, to bej 



155 



feet in. 



91 8 

 90 



92 51 



m 



It is not mentioned at what state of the tides the rise of the 

 Regent's Canal commences ; but the heights on the Grand Junc- 

 tion are said to .be from high water mark, and the range of the 

 tide is about IS feet at Northumberland Street. 



For your correspondent Mr. Bevan, I send you the height of 

 the barometer on the r2th instant. The cistern of the barometer 

 is about 30 feet above the level of the Paddington Canal. I am 

 sorry I had not an opportunity of getting more than one observa- 

 tion ; but as the day was very steady and favourable, I hope it will 

 not be useless. Your constant reader, 



• To Mr. TillocL T. R. 



Feb. 12 1821 lO o'clock morning Bar. 30-185. Ther. att. 



56=. Ther. det. 34^ 



Arlington-Street, Catnden-Town, Fob. 14, 1821. 



SiTi, — In compliance with the invitation made by Mr. Bevan, 

 in yotir Journal for December and January last, I send you my 

 observations made in this place on the 12tii instant. The nearest 

 Water level to my habitation is that of tlie canal of Paddington, 

 but its relative height I do not vet know. 



Feb. 



12. 8''M. 

 12 

 51 E. 



Bar 



29-955 

 29-960 

 29-950 



'I'her. 

 det. 



40-2 

 40-2 

 36- 



Wind. 



Cloudy. N. E. 



Ditto. 



The wind abated. 



The detached thermometer in the air was exposed to the N. 

 Since the invitation of Mr. Bevan to observe, with the purpose 

 of ascertaining the relative level of places, the best opportuiiities 



U 2 aftbrdeil 



