A Practical Manual On Sea Water Distillation
With A Description Of The Necessary Machinery For The Process

APPENDICES. 231 Grate Area. Heating Approximate Surface. Weight. Width x Length. Sq. Ft. Sq. Ft. Tons. Cornish. (One Flue.) (80 lbs. w.p.) 4' 0" x 9' 0" 2' 0" x 3' 6" 7’0 135 3.0 4' 0" X 12' 0" 2' 0" x 4' 0" 8-0 170 3-6 4' 6" x 12' 0" 2' 3" x 4' 0" 9-0 190 4-0 4' 6" X 15' 0" 2' 3" x 4' 6" 10-1 230 4-8 5' 0" X 12z 0" 2' 6" x 4' 0" 10-0 210 4-7 5' 0" X 15' 0" 2' 6" x 4' 6" 11-25 255 5-45 5' 0" X 18' 0" 2' 6" x 5' 0" 12-5 305 6-25 5' 0" X 21' 0" 2' 6" x 5' 6" 13-75 355 7-0 5' 6" x 18' 0" 2' 9" x 5' 0" 13-75 350 7-1 5' 6" X 21' Q" 2' 9" X 5' 6" 15-1 410 7-9 5' 6" X 24' 0" 2' 9" X 6' 0" 16'5 470 8-7 6' 0" X 18' 0" 3' 0" x 5' 0" 15-0 370 7-6 6' 0" X 21' 0" 3' 0" x 5' 6" 16-5 435 8-5 6' 0" X 24' 0" 3' 0" X 6' 0" 18-0 500 9-5 Lancashire. (Two Flues, each.) (Both (Total.) (100 lbs. Furnaces.) w.p.) 6' 6" x 18' 0" 2' 6" x 4' 6" 22-5 420 11-5 6' 6" x 21' 0" 2' 6" x 5' 0" 25 493 12-6 6' 6" x 24' 0" 2' 6" x 5' 6" 27-5 564 13-8 6' 6" x 27' 0" 2' 6" x 6' 0" 30 633 15-0 7' 0" x 21' 0" 2' 9" x 5' 0" 27’5 541 13’6 7' 0" X 24' 0" 2Z 9" x 5' 6" 30-2 620 15-1 T 0" x 27' 0" 2' 9" x 6' 0" 33 595 16-6 7' 0" X 30' 0" 2' 9" x 6' 6" 35 775 ! 18 7' 6" X 21' 0" 3' 0" x 5' 0" 30 585 15*6 7' 6" X 24' 0" 3' 0" X 5' 6" 33 673 17-2 7' 6" x 27' 0" 3' 0" X 6' 0" 36 752 19 7' 6" x 30' 0" 3' 9" x 6Z 6" 39 839 20-5 8'0" X 21' 0" 3' 3" x 5' 0" 32-5 626 17-4 8' 0" X 24' 0" 3' 3" X 6' 6" 35-7 719 19-2 8' 0" X 27' 0" 3' 3" X 6' 0" 39 805 21 8' 0" X 30' 0" 3' 3" x 6' 6" 43 900 23 The width of grate (i.e., each furnace) may be taken as the diameter of each flue, whilst the length of grate is the length of the fire-bars. The theory of combustion in a boiler is that about 50 per cent, of the total heat given out by the fuel is directly transferred to and absorbed by the boiler parts enveloping