VI. RESERVOIRS OF ENERGY. 465 



movable side, the disc or " fan " can readily be examined or removed in a few 

 minutes without in any way disturbing or interfering with the suction or 

 delivery pipes. This is found in practice to be a very great advantage. 



Also by making the side removable the amount of both machine and hand 

 work in fitting up the pumps is greatly reduced. The size and weight of 

 any pump (to raise a given quantity of water) are considerably diminished, 

 so that pumps made on this system are far more compact and portable than 

 any centrifugal pumps of the ordinary construction. 



One of Lawrence and Porter's pumps with discharge pipe six inches 

 diameter, and weighing only 3| cwt., is capable of raising 900 gallons of 

 water per minute, or 54,000 gallons of water per hour. Many of these pumps 

 are now actually at work with highly satisfactory results, and they have re- 

 ceived favourable notice by the scientific press. 



In the model the side can be removed by simply pulling it gently in a 

 horizontal direction, as the nuts are merely for show, and do not hold it 

 on, and by loosening the small screw in the pulley the disc and spindle can be 

 instantly withdrawn for examination. The patentees will be glad to give 

 further information. 



2O64a. Appold's Original Centrifugal Pump and Four 

 trial Discs. The Council of King's College, London. 



2O66. Archimedean Screw, with glass screw to show the 

 raising of the water. Elliott Brothers. 



VI. RESERVOIRS OF ENERGY. 

 BOILERS, INJECTORS, PRESSURE GAUGES, ETC. 



1969. Drawing, water-colour, on a J-inch to 1 foot scale. 

 A pair of doubly flue tubular Cornish boilers for high-pres- 

 sure. Adamson's patent. D. Aclamson & Co.. Engineers, Hyde 

 Junction, Manchester. South Kensington Museum. 



Two of these boilers were lent to H.M.'s Commissioners for the Vienna 

 Universal Exhibition of 1873, for use in supplying steam to drive the British 

 machinery exhibited in motion. 



The drawing shows front or firing and elevation of boilers ; longitudinal 

 elevation with brick setting. 



Longitudinal sectional elevation, showing arrangement of flues; blow-off, 

 feed, and other 'pipes. Brick settings. 



Two cross sections. One through centre of boilers ; the other through 

 back end, showing brick setting, flues, &c. 



1970. Sectional Model, in brass, showing the tubular arrange- 

 ment, water spaces, and circulation of Richardson's patent vertical 

 high-pressure steam boiler. Robey & Co., Limited, Engineers, 

 Lincoln. South Kensington Museum. 



1971. Drawing of Richardson's patent vertical high-pressure 

 tubular steam boiler. Made by Robey & Co., Limited, Engineers, 

 Lincoln. South Kensington Museum. 



The drawing shows a sectional elevation indicating the water circulation 

 and the direction of the fire and products of combustion. Also a sectional 

 plan of the boiler. 



40075. G g 



