REFERENCES
- J. Snowden Bell, "The Epochal Locomotive George Washington", Baldwin Locomotives, (January 1929), pp. 70–73.
- R. A. Whitehead, Austrian Steam Locomotives, 183 7–1981, (R. A. Whitehead & Partners, Tonbridge, 1982), p. 27.
- Karl Golsdorf, Geschichte der Eisenbahnen der õsterreichisch-Ungarisch Monarchie, (Prohaska, Tetschen, 1898), Vol. 2, pp. 438 & 453.
- C. W. Siemens, "Le Chatelier's Plan of Using Counter Pressure Steam as a Break in Locomotive Engines", Proc. I.Mech.E., Vol. 21 (1870), pp. 21–58.
- Alexander Allan, "On Increased Break Power for Stopping Railway Trains", Proc. I.Mech.E., Vol. 10 (1859), pp. 230–237.
- Jas. F. McEwan, "The Locomotives of the Caledonian Railway", The Locomotive, Railway Carriage & Wagon Review, Vol. XLVIII (1942), p. 107.
- Ibid., p. 35.
- F. C. Hambleton, "Alexander Allan", The Locomotive . . ., Vol. XLVII (1941), pp. 31–36.
- Fischer von Röslerstamm, "Hemmung der Eisenbahnzuge durch Absperren der Dampfabströmung an den Lokomotiven", Zeitschrift des Osterrreichische 1ngenieur und Architecten Verein, (1860), pp. 158–159.
- E. Metzeltin "Die Entwicklung der Gegendruck Bremse", Die Lokomotive, (January 1944), pp. 9–13.
- L. Le Chatelier, Memoire sur la Marche à Contre-Vapeur des Machines Locomotives, (Imprimerie Adminis-trative de Paul Dupont, Paris, 1869); and Supplement au Mémoire sur la Marche a Contre-Vapeur des Machines Locomotives, (Imprimerie de E. Martinet, Paris, 1869).
- L. Le Chatelier ( translated by Lewis D. B. Gordon), Railway Economy: Use of Counter Pressure Steam in the Locomotive Engine as a Brake, (Edmonston & Douglas, Edinburgh, 1869).
- Letter from A. Alexander, The Engineer, Vol. 28 ( July—December 1869), p. 229.
- John Robinson "On Modern Locomotives designed with a view to Economy, Durability and Facility of Repair", Minutes of Proceedings of the Institution of Civil Engineers, Vol. XXXVII (1873–74), pp. 1–58. ( Relevant remarks on pp. 19, 23–28 & 52).
- E. L. Ahrons, The British Steam Railway Locomotive, 1825–1925, ( The Locomotive Publishing Co., London, 1927), p. 209.
- Anon., "Locomotive History of the Stockton & Darlington Railway, 1825-1876", The Locomotive . . Vols. 31-36 (1925–30). ( Relevant passages Vol. 35, p. 392 and Vol. 36, pp. 18, 140 & 170).
- Patent No. 64 of 10 10 1871, granted to William Bouch.
- Wolfgang Messerschmidt, Zahnradbahnen Gestern—Heute—in aller Welt, (Frankh'sche Verlagshandlung, Stuttgart, 1972), pp. 26–27.
- Alfred Moser, Der Dampfbetrieb der Schweizerischen Eisenbahnen, 1847–1966, ( Fourth revised edition, Birkhäuser Verlag, Basel & Stuttgart, 1967), pp. 12–13, 353 & 356–358.
- G. V. Lomonossoff, Lokomotivversuche in Russland, (V. D. I. Verlag, Berlin, 1926), p. 46.
- A. Herdner, "La Contre-Vapeur, sa puissance, son emploi actuel", Memoires de la Sociéte des Ingenieurs Civils de France, (1917), pp. 522–631 & 897–899.
- T. Robson, "The Counter Pressure Brake Method of Testing Locomotives", Journal I. Loco. E., Vol. XXXIII (1943), pp. 171–217.
- E. L. Ahrons, "The Counter-Pressure Braking System", The Locomotive. . ., Vol. XXXI (1925), pp. 313–315 & 363–364.
- P. C. Dewhurst, "The Modern Counter-Pressure Brake as used on Steep-Gradient Railways", The Locomotive . . ., Vol. XXXII (1926), pp. 96–97.
- R. Helmholtz & W. Staby, Die Entwicklung der Lokomotive, Vol. 1, 1835–1880; Vol 2, 1880–1920, (Verlag R. Oldenbourg, Munich & Berlin, 1937).