Mechanical Contracting & Plumbing January-December 1912 . Dividethe curved part into equal spaces, andnumber each space. Continue the num-bers to the end of the profile. Lay out the stretchout line N-M andtransfer the profile to this line andnumber to correspond. Draw the measurement lines fromeach number. Draw the back line O-P, and draw alight or dotted line from each number on the profile to this line. With the dividers transfer the differentspaces to the measurement lines hav-ing the same numbers. Connect the different points and thepattern is developed. Figs. V and 8 show the same pattern
Mechanical Contracting & Plumbing January-December 1912 . Dividethe curved part into equal spaces, andnumber each space. Continue the num-bers to the end of the profile. Lay out the stretchout line N-M andtransfer the profile to this line andnumber to correspond. Draw the measurement lines fromeach number. Draw the back line O-P, and draw alight or dotted line from each number on the profile to this line. With the dividers transfer the differentspaces to the measurement lines hav-ing the same numbers. Connect the different points and thepattern is developed. Figs. V and 8 show the same patterndeveloped in a different and easier man-ner. The profile is drawn the same asFig. 5, and the stretchout the same asFig. 6, but instead of using the lineO-P and the dividers to transfer thespaces to the stretchout line, the T-sqr. is used instead. This is done in the following manner:Place the T-sqr. parallel to the lineN-M and bring it against each numberon the profile, and drop a line to themeasurement line on the stretchout linehaving the same Methods of Sewage Disposal Size of Septic Tank. The discharging or dosing chambershould be made of such size as to holdthe liquid sewage which would accumu-late in it from twelve to twenty-fourhours. In figuring out the size of thetank necessary, the following may betaken as a safe rule, viz., for every occu-pant of a private house or hotel, allowthree cubic feet of space in each com-partment, while for a school or factory,where, as in the case of a house, nothingbut domestic sewage is to be treated, one-third less space will be sufficient. In anyease, the capacity of the septic tankshould be at least equal to three-quartersof the daily volume of sewage. If madesmaller than this, it becomes rather amere settling tank; if made too large,causing the sewage to remain too long inthe septic tank, too much anaerobic ac-tion may take place, which is found tobe detrimental to subsequent Irrigation. The last stage
Size: 1584px × 1576px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectplumbin, bookyear1912
