Carpenter . n you readthis, for it is a fact that a large planingmill in Alabama has followed this practicefor a long time and a mysterious boilerexplosion would not be a surprise to meif it occurred there at any time. Dont forget to give the bottom valveof the collector enough opening to makethe shavings feed freely to the furnacewhen using the feed to the furnace directfrom the separator. A coke-up in thefeed pipe is frequently caused by neglect-ing this valve. Last, but not least, dont neglect to takeand read the best books or papers you canget that cover your line of work, and ifyou cannot
Carpenter . n you readthis, for it is a fact that a large planingmill in Alabama has followed this practicefor a long time and a mysterious boilerexplosion would not be a surprise to meif it occurred there at any time. Dont forget to give the bottom valveof the collector enough opening to makethe shavings feed freely to the furnacewhen using the feed to the furnace directfrom the separator. A coke-up in thefeed pipe is frequently caused by neglect-ing this valve. Last, but not least, dont neglect to takeand read the best books or papers you canget that cover your line of work, and ifyou cannot buy all of them, dont hesitateto borrow from those who do buy, untilyou form the reading habit and get in aposition where you can spare enough moneyfrom your other needs to pay for the read-ing. Laying Out Jack Rafters. I!ditor The Carpenter: Here is a much shorter method thanBrother Wallands (as described in theMarch issue of The Carpenter) of findingthe relative shortness of jack rafters over l< jg^i V. Tlhie Carpemiter square plans. Sketch shows the only one line is required to be any width hoard and lay on squareat the pitch. Mark along blade the pitchline as shown. As the rafters are spaced16-inch centers, slide square to the figures10 on blade and where tongue cuts edge ofboard in this new position is the difFerencein length of jack rafters. If rafters arespaced at any other distance, slide to thefigures representing that distance, and thecorrect result is again obtained. In theevent of spacing being beyond the dimen-sions of square, take any proportion of thedistance and irailtiply the result obtainedby that proportion. Fraternally yours, W. FRANKS, L. U. , Ont. K=Radius—(J D. L=L-ength—A D A=Area. As an illustration I have used a segmentwith a span (A B) of 120 and a height(E D) 20. (1) To find the radius when the span(A. B) and height (E D) are known:S=+4H= 12-+4X2^ R = lOO Radius. 8H 8X2 Answer. (2) To find the height (E D) w
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Keywords: ., bookcentury1900, bookdecade1910, bookidcarpenter30u, bookyear1910
