REPORT ON HYDRAULICS. — PART II. 



497 



According to the experiments of Mr. Giles in the year 182.3, 

 the velocities of the flood tide are, — 



From London Bridge to Putney Bridge, 2^ miles per hour ; 



Between London, Southwark, and Westminster Bridges, 2 do. 

 And with an ebb tide the velocities are, — 



Between Westminster and Waterloo Bridges, 2 miles per hour; 



Between Waterloo and Blackfriars Bridges, 2^ do. ; 



Between Blackfriars and London Bridges, 2| do. 



Experiments on the Flood Tide of the River Thames from London Bridge, 

 \9th of June, 1834.* (Wind W.S.W. Fresh breeze and clear.) 



Name of place. 



Tide j Distance 

 Gauge at, from 

 London London 

 Bridge. Bridge. 



Time 

 from low 

 Water. 



Velocity 

 at each 

 place. 



London Bridge .... 



Southwark do 



Blackfriars do 



Waterloo do 



Hungerford Market . 

 Westminster Bridge . 



Horse Ferry 



Vauxhall Bridge . . . 

 Chelsea Col. (Stairs) . 

 Chelsea Bridge .... 

 4 mile above do. . . . 

 1 mile do. do 



1 ^ mile(Wandsworth) 



2 miles 



Putney Bridge . . . 

 2^ miles 



3 miles from Chelsea 

 Bridge 



3^ miles , 



4 miles 



HammersmithBridge 

 4| miles 



5 miles (Chiswick) . 

 5^ miles 



6 miles 



6i White Hart,BarneE 

 Thirty yards above 



the White Hart . 



min, 



6 

 30 

 53 

 14 

 23 

 3G 

 50 



3\ 

 34 

 55 



9 

 20 

 31 

 42 

 50 

 53| 



6 

 20 

 30 

 35 

 45 





 15 

 35 

 45 



ft. in. 



17 3 



14 11 



13 



11 5 



10 10 



9 3 



8 10 



7 11 



5 10 



4 2 



9 

 8 

 8 



10 



1 2 



1 11 



2 11 



4 5 



5 1 



1 50 5 5 



miles. 

 0-0 

 0-28 

 0-75 

 1-34 

 1-50 

 2-00 

 2-42 

 2-95 

 4-21 

 5-04 

 5-54 

 604 

 6-54 

 7-04 

 7-48 

 7-54 



8-04 



8-54 



9-04 



9-20 



9-54 



10-04 



10'54 



11-04 



11-29 



11-30 



hrs. min. 

 31 



55 



1 18 

 1 39 



1 48 



2 1 



4 31 

 4 45 



4 55 



5 



6 10 



6 15 



miles per 

 hour. 

 000 



0-70 

 2-16 

 1-68 

 1-07 

 2-30 

 1-82 

 2-33 

 2-48 

 2-36 

 2-14 

 2-73 

 2-73 

 2-73 

 3-30 

 1-03 



2-40 

 2-14 

 300 

 2-00 

 2-00 

 2-00 

 2-00 

 1-50 

 1-50 



Float put in at centre 

 Centre of centre arch 

 4th City arch. 

 2nd City arch. 



6th Middlesex arch. 



Centre arch. 



6th arch. 



11th arch. 



from Middlesex 

 pier. 



Tide had fallen 4 in- 

 ches. 



^0 8 I ""^^^' '^'■'"'^y high-water mark. 



hrs. min. ft. in. 

 Low water at London Bridge ... 7 35 ... 20 3 

 High water at ditto. ...12 30 



* These experiments were tried with floats immersed at different depths; also with 

 Massev's patent log. 



18.34. 2 K 



