In the space between the boiler shop and the machine shop there are situated a well-arranged furnace for heating, and the vertical rolls for bending the large plates forming the shells of the marine boilers. In the furnace just mentioned the plates are heated while standing on their edge, and as the top of the furnace is level with the ground, they are readily lifted out by a portable crane and deposited on the bed-plate adjoining the vertical rolls. In this vacant space is also situated the water tower for the accumulator for the 100-ton crane, constructed by Sir Wm. G. Armstrong and erected at the side of the Devonshire Dock, where the machinery is placed on board and fixed for new ships. The engine shop, although 420 ft. long by 100 ft. wide, is scarcely large enough for the pressure of work oftentimes concentrated there. This shop is unsurpassed in the completeness of its fittings and the perfection of its tools. It, like most of the other shops in the establishment, is fitted up with the electric light. * * * * * The foregoing descriptive notes of individual yards may fittingly be supplemented by the following table, which shows the number and relative positions of firms throughout all the districts whose total output of tonnage during the year 1883 exceeded 20,000 tons:— +------------------------------+-------------+-----------+---------+ | Firm’s Name. | District. | Number of | Gross | | | | Vessels. | Tonnage.| +------------------------------+-------------+-----------+---------+ | 1. Palmer Shipbuilding Co. | Tyne | 36 | 61,113 | | 2. John Elder & Co. | Clyde | 13 | 40,115 | | 3. Wm. Gray & Co. | Hartlepool | 21 | 37,597 | | 4. Oswald, Mordaunt & Co. | Southampton | 15 | 33,981 | | 5. Raylton, Dixon & Co. | Tees | 17 | 31,017 | | 6. Harland & Wolff | Belfast | 13 | 30,714 | | 7. Russell & Co. | Clyde | 28 | 30,610 | | 8. Jos. L. Thomson & Sons | Wear | 16 | 30,520 | | 9. Short Bros. | Wear | 14 | 25,531 | | 10. R. Napier & Sons | Clyde | 6 | 23,877 | | 11. Armstrong, Mitchell & Co.| Tyne | 17 | 23,584 | | 12. A. Stephen & Sons | Clyde | 11 | 23,020 | | 13. James Laing | Wear | 9 | 22,877 | | 14. Pearse & Co. | Tees | 9 | 22,671 | | 15. Wm. Denny & Bros. | Clyde | 10 | 22,240 | | 16. Richardson, Duck & Co. | Tees | 12 | 21,413 | | 17. Edward Withy & Co. | Hartlepool | 12 | 21,197 | | 18. Swan & Hunter | Tyne | 15 | 20,080 | +------------------------------+-------------+-----------+---------+