Many other articles in the _Scientific American_, some of which are: “Ponchain’s Electric Carriage,” Vol. LXX, p. 69; “The Tachocycle,” p. 181; “Gaillardet’s Steam Carriage,” p. 200; “Simonds’ Steam Wagon,” p. 398; “Bicycle of 1816,” Vol. LXVII, p. 180; An Account of an automobile race from Paris to Bordeaux with descriptions of some of the machines participating, LXXIII, p. 40; “An English Horseless Carriage of 1827,” p. 214; “Duryea Motor Wagon,” p. 293; “Petrolium Tricycle,” p. 234; “Kane-Pennington Victoria,” p. 293; “The Benz Motocycle,” p. 315; “De La Vergne Motor Drag,” p. 377; “Steam Omnibus in London, 1833,” p. 404. Firestone Ship by Truck Bureau, Bulletin No. 6, “Consolidated Rural Schools and the Motor Truck”; Bulletin No. 7, “The Motor Truck Terminal.” Akron, Ohio. Facts and Figures, 1922. “Motor Bus Aids Rural Education,” National Automobile Chamber of Commerce, New York. GREENOUGH, M. B., “Motor Trucks and Highway Transportation,” _Engineering and Contracting_, Vol. XLIX, pp. 157-158. JOHNSON, EMORY R., “Elements of Transportation,” D. Appleton & Co., New York, 1909. LACY, V. E., “Inland Waterway Transportation,” _Journal of the Society of Automotive Engineers_, Vol. VIII, pp. 59-62. LANE, F. VAN ZANT, “Motor Truck Transportation,” D. Van Nostrand Company, New York, 1922. MACKALL, J. N., “Motor Bus as a Factor in Highway Transport,” _Engineering News-Record_, Vol. LXXXIII, p. 234. MANTELL, JOHN J., “Transportation Problems of the Metropolitan District,” Official Proceedings of the New York Railroad Club, Vol. XXXI, pp. 6369-6393. _Mechanical Engineering._--Discussion on Motor Truck Transportation, Inland Waterways, etc., Vol. XLIII, pp. 181-183. Motor Rail Cars: _Railway Review._--Vol. LXIX, pp. 753-755, 792-796; 860, Vol. LXX, 49-50, 191-192, 389-392, 501, 656, 669-673, 741-747, 928-929, 930. _Railway Age._--Vol. LXXI, pp. 841-843, Vol. LXXII, pp. 749-750, 886, 920, 1008-1009, 1069-1070, 1183-1184. _Electric Railway Journal._--Vol. LXIX, pp. 419, 513, 685-686. _Municipal Engineering._--“Text of Colorado Decision Affecting Commercial Use of Highways.” Vol. LXIII, sup. pp. 17-18. National Automobile Chamber of Commerce.--Graham, George H., “The Motor Vehicle--Competitor or Ally,” 1920. NORTON, S. V., “The Motor Truck as an Aid to Transportation,” A. W. Shaw Company, Chicago. _Power Wagon._--Various articles March, July, October, November, and December, 1921, and during the year 1922. STOCKS, C. W., “The Bus Transportation Field,” _Electric Railway Journal_, N. Y., Vol. LVIII, pp. 517-522. SPENCE, LEWIS J., “New Era of Railroad Transportation in America,” Paper before the National Industrial Traffic League, _Railway Age_, Vol. LXIX, pp. 1153-1154. UPHAM, C. M., “Car Shortage and Its Relation to Highway Work,” _Engineering News-Record_, Vol. LXXIX, pp. 1099-1100.