Major Adelsköld, however, was convinced of the soundness of his proposal, and consequently continued his efforts in the face of spirited opposition. The bridge was built at Bergsund, and the dimensions were calculated for a strain of 8 tons per square inch, though the metal was tested to twice that stress before being set in position. The total weight was only 50 tons. From the engineering point of view the design is considered somewhat novel, for it bears no resemblance to the general conception of a suspension bridge. It is an inverted structure of this class. The upper members act merely as struts to keep apart the ends of the chains below, which really carry the load through the medium of the triangular members. The method by which the structure was erected was quite as interesting as the design of the bridge itself. The girders were brought to the western bank of the river. To swing them into position a derrick was rigged up on either bank so as to overhang the water. The outer ends of these masts, which measured 60 feet in length, were fitted with heavy pulleys, over which ropes were passed and carried from capstans installed for hauling purposes. The pulley ropes on the eastern bank were pulled across the waterway and secured to one end of the girder, while the western bank pulley ropes were secured to the other end of the steel member, which measured 153 feet in length. In this way the girder was lifted, swung over the water, and lowered into position. The event was regarded as so unusual that crowds of people from Gothenburg and Tröllhätten assembled on the banks to witness the setting of the steel on February 8, 1866. Owing to the roar of the waters, the engineer could not make his voice heard, so orders were communicated across the river in Morse code by hand-signalling. The first girder was lifted and set in position in thirty minutes, while the second was handled in half that time. Once the girders were set it was an easy matter to complete the remainder of the structure. It may be interesting to relate that the total cost of setting the main girders, together with the hire of the tackle borrowed from a Gothenburg shipbuilding-yard, and including the wages of the men assisting in the task, was only £25, or $125. At that time Major Adelsköld’s feat was regarded as an audacious stroke of engineering, but to-day steel is the exclusive material employed in the erection of bridges. Railway-building in these twin countries has been attended always with grave difficulties, owing to the rugged nature of the country and the extreme hardness of the rock. When the sea is left, and the interior plateau is gained, the full brunt of the Arctic weather is experienced, and it is of a character to deter the most intrepid engineer.