62 REPORTS ON AWARDS. 163. Government of Chili. TOPOGRAPHICAL CHARTS. Report.—Commended for the great collection of charts presented by the Government of Chili, embracing the whole State, including its coast.. Generally well made. These works commend the Government of Chili, and .show how much it is interested in the develop ment of commerce and industry generally. 164. Ministry of Public Works, Paris, France. PUBLIC WORKS OF FRANCE. Report.—This is a most carefully arranged and extensive exhibit, relating to important works of every class, as executed in different parts of the country. It includes maps, plans, models, photographs, apparatus, etc;, illustrating the systems and processes employed in the whole range of engineering works. It is needless, in view of the high state of the engineering art in France, to say more than that this display does great credit even to the source whence it comes. PUMPING MACHINES FOR THE SUPPLY OF THE CANAL BETWEEN AISNE AND MARNE, AT CONDt-SUR-MARNE. Report.—The canal between the rivers Aisne and Marne, connecting the iron ore basin of St. Dizier with the Belgian collieries, runs across very permeable strata. It has been necessary to give it an impermeable lining, and to take the water supply required for navi gation from the river Marne by means of pumps worked by water power. The apparatus * consists of five Koechlin turbines driving double-acting pumps. These pumps have valves of a novel construction, very remarkable for their excellence of arrangement. Seven years’ successful working has fully attested the perfection of the system and of its manner of ex ecution. The water supply has been ample for a traffic of four hundred thousand francs per year. DRAWINGS OF ARMEN LIGHT-HOUSE. Report.—The construction of the Armen light-house is one of the most daring enterprises ever conceived and executed-for the safety of navigation and for the benefit of humanity, as it is erected over one of the most dangerous reefs of the Armorican coasts, where even landing had been deemed almost impossible, on account of the violence of the currents and of the continuous breaking of the waves. It does the greatest honor to the engineers and to all the workmen engaged in the con struction, whose courage and energy have secured the completion of this audacious work. MODELS AND DESIGNS CONCERNING THE RIVER YONNE WEIR AT “LA BRUL^E.” Report.—The securing of a permanent navigation of the river Yonne, which had previ ously been subject to great interruption, offers one of the best examples of the advantages of falling-top shutters, invented and improved by French engineers. The same exhibits illustrate also the raising of the shutters by hydraulic power, as practiced at the dam of “ La BrulSe,” the power being furnished by the water-fall itself. MODELS AND DESIGNS DESCRIBING THE MOVABLE WEIRS OF THE UPPER SEINE. Report.—The construction of movable weirs with navigable passes on the Upper Seine has been very successful in the improvement of navigation by new systems of automatic wickets and of frames specially adapted to high lifts.
