alleled by any locomotive in any part of the world.

The "Atlantic," which was the Davis' perfected construction following the "York," was placed in service on the Baltimore & Ohio Road in the summer of 1831, and until withdrawn for the purpose of exhibition in the spring of 1893 was never off duty. No material changes were made in the engine as the years went by. It was after a time relegated to switching service and finally found place in the yard company's shops at Mount Clare where for a long number of years it was constantly

road wheels to one of the cranks, its speed was proportionately great for which its tubular boiler and fan blast for its Anthracite coal fuel offered abundance of steam. It was designed for speed in propelling passenger trains, hence only one pairthe front one of its four wheels was used as drivers, and on which pair nearly twothirds of its weight was made to rest. The "Atlantic" averaged from twelve to fifteen miles an hour against an extreme grade of 37 feet to the mile and a curve of 400 foot radius. The "Atlantic" is to-day as originally constructed, thus enabling a study of

Andrew M. Eastwick in successfully solving the problem of the distribution of weight upon driving wheels made possible. the operation of locomotives of a much more powerful build than any known up to 1837; in fact brought into being the father, it might be said, of the mighty 100-ton engines of to-day. The "Hercules" was the wonder of its time and its then enormous weight of fifteen tons was regarded with grave skepticism by most builders. Doubts were freely expressed that it would not turn curves or go into switches without trouble owing to its weight. The road it

THE "MICLARE." 1845.

Photo by W. H. White, Chicago.

one pair behind the fire box. This separate frame was made rigid and vibrated upon its center vertically. The weight of the engine rested upon the center of the sides of this separate frame through the intervention of a strong spring above the main frame, the separate frame being held in place by a pedestal bolted to the main frame, the centers of the main frame vibrating upon a journal sliding vertically in this pedestal. Shortly after the completion of the "Hercules" it was seen that a more perfect equalization of the weight on each of the driving wheels would be obtained if

the Baltimore & Ohio Railroad Company. Full size working reproduction constructed by detailed drawings made by Mr. Murray, who is still living.

Mr. Murray who at this time (1893) is residing with Mr. William Winans in London, Eng., is still living, in his 84th year, in possession of a most excellent memory and with the brightest and clearest of faculties gives every promise of years yet of a well earned leisure. Mr. Murray has taken much interest in the preparation of this collection and prepared papers for preservation of great value in establishing facts in connec

on a wooden string piece between Baltimore and Harper's Ferry and feared to introduce larger wheels and greater spread of wheel base than had previously been determined practicable. The cylinders were placed inside and immediately under the smoke box, the wheel having a diameter of 35 inches and the gearing so proportioned as to make them equal to 50 inches in diameter. valve gear did not embrace 'cams,' as this was a fault in the Winans geared engine which I intended to avoid. The valves had considerable lap on the induction sides and there was an arrangement on the backs of

The