84 SCIENTIFIC SURVEY OF YORK AND DISTRICT 



The floating landing-stage for the Port of I>ondon Authority at Tilbury 

 (which was opened by the Prime Minister on May i6, 1930). This stage is 

 1,100 ft. long and will accommodate ocean-going liners. 



The supply and erection of steel pipes for carrying the water supply for 

 the Corporation of Calcutta, the diameter of the pipes varying from 3 ft. 

 to 5 ft., the weight involved being about 17,000 tons. 



The Coventry Power Station, which was designed and built by the 

 Cleveland Bridge & Engineering Co. Ltd., of Rugby ; and 



A new wagon works for the London & North Eastern Railway at Faver- 

 dale, Darlington, the contract for which included all site levelling, drainage, 

 foundations, roads and buildings. 



A new bridge over the Nile, near Alexandria, has just been completed 

 for the Egyptian State Railways. 



Later contracts, on which the firm is now engaged, include a ferro- 

 concrete bridge over the Thames at Chiswick and a bridge over the 

 Zambezi in Portuguese East Africa, of a total length, bank to bank, of 

 2 J miles, with about 30 miles of approach railway. This bridge being 

 founded mainly on sand, the piers have to be sunk no ft. below low- 

 water level. 



The Blackburn Aeroplane & Motor Company, Ltd. 



Originally established in Leeds, the above company has now moved 

 its whole works to its erection and test base at Brough, where the excep- 

 tional facilities for both land and sea-plane tests are of great advantage. 



The success of the company's products last year, including the winning 

 of the King's Cup Air Race and the Grosvenor Cup, are an indication 

 of the quality of their machines, while the record time (thirty working 

 weeks) in which they delivered a new ' Iris III ' Flying Boat to the 

 Royal Air Force indicates efficiency in manufacture. 



City of York Electric Lighting Department. 



At the Foss Islands generating station there are four turbo-generating 

 sets, two of 6,000 kw. and two of 3,400 kw. each, with the appertaining 

 steam-raising plant, switch gear, etc. 



At the Linton Hydro-electric Works there are two water turbines of 

 500 and 250 kw. respectively, a visit to which, by motor launch, has been 

 arranged. 



Messrs. Rowntree's Cocoa Works. 



The power plant services at Messrs. Rowntree's cocoa works 

 comprise : 



(i) Electricity. — Obtained from the York Corporation at 3 ,000 volts A. C. 

 and mostly converted to 230 volts D.C. 



(2) Steam. — There are three boiler houses, in the newest of which two 

 large water-tube boilers are at present being erected. 



(3) Refrigerating Plant. — Six ammonia compression units cool brine 

 for circulation in the factory. 



(4) Water Supply. — Partly obtained by pumping from artesian wells 

 and partly from the city supply. 



