. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . late 50s and early 6os stacks asshown in accompanying picture wereused on the Old Colony. The dicky on the top was larger than the stackand open at the bottom, the theorybeing that air passing between thestack and dicky would have a ten-dency to give the smoke an upwardmotion to the relief of passengers. Inconnection with these stacks the Bul-lock spark catching device was used,the sparks falling into a sheet iron boxmidway between the frames and just inrear of the truck wheels. These stacksg
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . late 50s and early 6os stacks asshown in accompanying picture wereused on the Old Colony. The dicky on the top was larger than the stackand open at the bottom, the theorybeing that air passing between thestack and dicky would have a ten-dency to give the smoke an upwardmotion to the relief of passengers. Inconnection with these stacks the Bul-lock spark catching device was used,the sparks falling into a sheet iron boxmidway between the frames and just inrear of the truck wheels. These stacksgave way to the diamond stack, in1865. The stack was painted dicky and bands around thestack were a bright red and were kept ri 111- AriRiNTU I - can flow on the center. Place /i inside, bore the bottom with aslight curve, and you will find that theball will seat over the center of the3/16 in. hole and prevent any leak ofoil when the engine is at rest. As soonas the engine moves, the vibration ofthe machine causes the ball to moveor roll about and oil drops through ti>. II |> I \s;i InXKl) >lk.\l(;llT ST.\CK. scrupulously clean and shiny with anample supply and use of waste, tallowand elbow grease. .At the present timebut little of either of these articles isused on stacks to say nothing of onother parts of the engine. Riier, Mass. Predictions. It is amusing to read the discussionsin technical meetings long gone andthe predictions concerning lines ofprogress. At the master mechanicsconvention in 1883 a paper on Loco-motives was read by Mr. !•. W. Dean,a rising mechanical engineer. Mr. Dean showed himself deeplyiiiamorcd of the Furopean style ofliKoinotivc, advocating the use of slabframes, plain, straight, domcless boilers,solid pistons and other novelties, liepredicted that Joys valve motion wasdestined to suiierscde the link niutloii. RAILWAY AND LOCOMOTIVE ENGINEERING. i-cbriiary, 1910. The World System of Railway Signals. In viewing
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