376 



Dr. FiTTON on the Strata below the Chalk. 



[App. C. 



Stations. 



Birmingham Railroad (^continued). 



Railroad at south-east end of Tunnel 



Bend of the Brook, east of Oxhey-lodge 



Turnpike road from London, near the en 

 trance of Watford 



Valley, or flat, of the Colne, north-east of 

 Watford 



Road from Watford to St. Albans, midway 

 between Callow-land awA Nascot-farms... 



Highest point over the Tunnel at Russel- 

 farm, near the top of /J in Ilussel 



Railroad at entrance of the Tunnel 



Grand Junction Canal, about \ mile south- 

 east of Nash Mill 



Canal, about 3 miles from the last place, be- 

 tween Boxmoor and Boiirn-end 



Road to Berkhampstead Place, between the 

 Canal and the Castle 



Highest point over the Tunnel, near the road 

 from N. Church to Ashridge; bottom of 

 letter iV in Northchiirch 



Highest ground over the railway at Three- 

 score-acres lane ; east of a in Grand 



Road from Tring to Dunstable (boundary 

 between Herts and Bucks); about midway 

 between Folly and Bulbnrne 



Grand Junction Canal, south-east of Sea- 

 brook 



Height 



above the 



Datum 



Feet. 



236 

 214-83 



200-50 



189-25 



251-83 



342 

 250 



249 



297-83 



352 



442-42 

 461-83 



44617 

 347-75 



Stations. 



Road from Ivinghoe to Leighton-Buzzard ; 



on the south-west of /Tor/ow ; (acontinua 



tion of the Vale of Aylesbury) , 



Road from Leighton to Wing, at an elbow 



east of Southcot 



Railroad at entrance of the Tunnel Lins- 



lude Wood, north-west of Leighton 



Highest point of ground over the Tunnel, 



about letter / in Linslade 



Road from Great Brickhill to Soulbury, near 



Rislip farm ; north of ^ in Rislip 



to NewtonLong- 



ville 



Stream under the railroad between Water 

 Eaton and Bletchley, about -^ mile west of 

 the word Water, and south-west of Stony 

 Stratford 



Brook under tlie main road to Stony Strat- 

 ford, near Denbigh Hall; about 46^ miles 

 from London 



Average height of railroad, from the Tunnel 

 at Linslade Wood, to the road last men- 

 tioned about 



Grand Junction Canal, about ^ mile east of 

 Wolverton, north of letter Im Carial 



Bottom of the J'alley of the Ouse and Tove 

 Rivers; about 2^ miles north-east of ^iony 

 Stratford ; near r in the words River Ouse 



Height 



above the 



Datum. 



Feet. 



332-58 



318 



306 



391 



302-73 



317-69 



247 



264-42 



300 

 247-75 



213 



II.— PART OF THE SOUTH-WESTERN RAILROAD; LONDON TO BRISTOL. 



The former terminus, or starting point, of this 

 road, was on the Birmingham railway, 

 about a mile west of Kensal Green. The 

 present terminus is at Westbourn Green, 

 about \ mile north of Bayswater, on the 

 Uxbridge road from London. 



The Datum, or base, of the Section is sup- 

 posed to be about 7 feet above the Trinity 

 high- water mark, at the London Docks. 



[Therefore, (approximate) height of the da- 

 tum, above low-watermark at Sheerness 

 is (19-6699 -f 7) = 25-6699 feet.] 



Paddington Canal, at the north-west angle of 

 Old-oak Common , 



Brent River at Hanwell, south of letter H. 



Road from London to Uxbridge, near the 

 cross road from Greenford to Norwood and 

 Osterley Park 



Paddington Canal, east of letter Y in Yed- 

 ding Brook 



Grand Junction Canal, near Botwell 



River Colne, near W. Drayton ; west of the 

 words Colham Mill 



General level of the surface, on the line from 

 near Southall, to the heights over the Val- 

 ley of the 2'hames, east of Maidenhead 

 Bridge about 



Road from Slough to Stoke Poges ; about ^ 



mile from the cross roads 



Cross road from Amerton Bank to Taplow, 

 about 244 miles from London, on the road 

 to Maidenhead 



85 

 14 



65 



84 

 84 



68 



86 



90 



69 



River Thames, about \ mile south of Mai- 

 denhead Bridge , 



Highest point of ground over the railroad ; 

 north-east of the road fiom Shottesbrook to 

 Knowle Hill ; about + mile north of the let- 

 ters ot 



River Lodden, about a mile south-west of 

 Ruscombe church 



Road from London to Reading, about 36^ 

 miles; near letter k in Holme Park (over 

 the Tunnel) 



Railroad at the entrance of the Tunnel on the 

 east ; south-east of the 36th milestone 



Highest ground over the Tunnel near its 

 western extremity 



River Kennet, near Broken-brow, north-west 

 of letter B; about \ mile east of Reading 



General level of the Valley of the Thames, 

 from Broken-brow to near Kentwood,] 

 about 



Highest point of ground over the Tunnel 

 near Purley ; south of east of the words 

 Purley Ha II 



Road about 4§ miles from Reading to /*a«^- 

 bourn, north of y in Purley Hall 



Thames River, about \ mile north by east 

 fxo\n Moulsford C\\\vcc\\, Berks 



Highest ground over the line of railroad, be- 

 tween the Thames and West End, on the 



south-west of Cholsey Field 



Paper mill stream, north-east of South More- 

 ton; and north-west of P in Pa/)er 



56 



142 



95 



180 



126 



193 



98 



100 



253 



147 



117 



195 



134 



