Patent No 12,889 (1849) ‘Instruments for Measuring, Indicating and Regulating the Pressure and Temperature of Air, Steam, and other Fluids, and for Obtaining from them Motive Power’. This is in name of Cowper but describes Bourdon's inventions.
2.
Patent No 14,320 (1852) ‘Steam and Other Gauges’. This is in name of Newton but describes Schaffer's gauge.
3.
LambertL B. ‘A History of Pressure Measurement’. Presidential address read on 28th May 1963 to Society of Instrument Technology, published in Transactions September 1963. Reprinted Measurement and Control, Vol. 12, March 1979.
4.
EiffelGustave. ‘Travaux Scientifique Executes a la Tour de 300 Metre, de 1889 a 1900’. Paris, 1900, Mareththeux, Imprimeur.
