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54 JONES STOKERS ON LAKE VES- SELS. The Under-Feed Stoker Co. of America, Marquette building, Chicago, has just issued two catalogs of inter- est to steamship owners. One deals with the Jones stoker on the lake bulk freighter, James E. Davidson. It is illustrated with a number of ex- cellent views of the steamer, includ- ing a view. of the firehold showing six Jones stokers under her Niclausse boilers. Concerning the installation Mr G. A. Tomlinson, owner of the Davidson, has written to the com- pany as follows: ae "T am very much gratified to advise you that the stokers installed on the steamer James E. Davidson, which have been in operation since June 18. 1908, have fully fulfilled all the rep- resentations you made with respect to efficiency and economy. The steam- er Davidson has Niclausse boilers. A different method of firing the boil- ers was used each of the three seas- ons before the Jones stokers were in- stalled this season, and in each in- stance the operation of the ship was not reliable, the fuel consumptron per' trip was about 400 tons of slack coal. The fuel consumption with the Jones stoker is about 300 tons of slack coal for the round trip. Two of the firemen who shipped when the vessel began operation in June re- mained aboard until the vessel was laid up."- The other catalog deals with the Jones stoker on the hydraulic dredge Francis T. Simmons, engaged in work by the Lincoln Park board of commis- sioners, Chicago. Concerning the ef- ficiency of these stokers, Francis T- Simmons, president of the board of commissioners, writes: - "Regarding the efficiency of the dredge Francis T. Simmons, which is the property of the commissioners of Lincoln Park, I am glad to say that it has been enhanced very much 'by the installation of the Underfeed stokers. We suffered all the ills of bad smoke until on the 15th day of April, 1908, your stokers were in- stalled, and have been running 24 hours a day ever since. Our primary reason for installing them was that of abaiting the smoke, but we find that the economy resulting has been on its part even greater. Last year we used coal costing $3.75 per ton and fired by hand. This year the stokers have used $2.35 coal and the efficiency of the boilers has been up to the requirements constantly and at all times. We have often stated that Tae Marine REVIEW the great dredge made no more smoke than a kitchen fire. This may not be true, but comparatively speaking it is. Our repairs have been less than $5 for the entire season, speaking wholly for the construction of the machines. Where in the hrst place we felt they might not be popular with the firemen, we find the con- trary to be true, and when we con- sider the results obtained both on the question of smoke and economy, we 'feel we have been amply repaid for the cost of installation. We shall be very glad at any time to offer you the opportunity of showing the stok- ers to any one inclined to examine them." _ SURFACE CONDENSER MOUNT- ED OVER COMBINED AIR AND CIRCULATING PUMP. The accompanying drawing is a sec- tional view of an independent surface condensing apparatus now being manufac- tured by the A. S. Cameron Steam Pump Works, New York. shown mounted over a direct-acting com- bined air and circulating pump, the three The condenser © is are of seamless drawn brass, secured at each end into Muntz metal tube plates by means of brass screw glands packed with corset face, a shoulder on the screw glands preventing the tubes getting _out of place. The condenser can be opened up and inspected without discon- necting any of the pipe connections, The steam cylinder of the combined air and circulating pump is of the well- known Cameron type, with no outside valve gear. Both pump cylinders are brass-lined and fitted with brass pistons arranged for fibrous packing. The piston rods are of Tobin bronze and separate at the steam piston. The valve system in both air and water cylinders is of. the usual Cameron arrangement and is eas- ily inspected on removing the cylinder covers. Each valve stem holds two valves with their springs one above the other, so that by unscrewing one plug and pulling out the stem both are re- leased. Where there is not sufficient head room the condenser may be placed along- side, the pump, but in all cases must be high enough forthe condensed water to _ flow by gravity to. the air. pump. The. A. *S: «Cameron, :Steam Pump Yl y = o B i + ery ae 65 i Ze er PUMPS. cylinders of which are arranged in line, the steam cylinder being in the center and the steam and the air and water cylinders at each end. The water cham- ber of the condenser rests directly on top of the water cylinder and the circu- lating water passes upward from the water cylinder, through the lower bank of tubes and teturns through the upper bank of the discharge at the highest point of the water chamber. Exhaust steam entering the top of the condenser near the circulating water outlet spreads along the entire length of the condenser before passing on its course down through the tubes where it is condensed. The condenser shell, water chamber, and covers are of cast iron. The tubes Works are prepared to build all sizes of surface condensers up to 1,500 H. P., and can furnish condenser shells of sheet steel or copper where lightness is 4 factor, or pump ends of all brass, if de- sired, A. P. Kenyon, of Marine City, Mich. has done quite an extensive 'business in repairs and rebuilding wooden ves sels during the past year, aggregating $60,000. For labor the expended the sum of $26,000 and there was a pay day for each week of the entire year. Mr. Kenyon expects to do a good business in rebuilding and repairs dur- ing the winter and spring. .