─────┬───────┬────────────────────────────┬──────────────────────────── Case │Example│ Given │ Found ─────┼───────┼─────┬─────┬────┬────┬──────┼─────┬─────┬────┬────┬────── │ │ _n_ │ _Q_ │_V_ │_d_ │ _S_ │ _n_ │ _Q_ │_V_ │_d_ │ _S_ ─────┼───────┼─────┼─────┼────┼────┼──────┼─────┼─────┼────┼────┼────── 1 │ 1 │0.015│ 1.0│ 2.5│ 6│ │ │ │5.0 │ │0.0575 1 │ 2 │ .015│100.0│ │ │ │ │ │8.5 │ │.0065 1 │ 3 │ .020│ 1.0│ │ 6│ │ │ │5.0 │ │.13 1 │ 4 │ .020│100.0│ │ 48│ │ │ │8.5 │ │.0125 2 │ 1 │ .015│ 5.0│ │ │0.0003│ │ │1.2 │28 │ 2 │ 2 │ .010│ 5.0│ │ │.0003 │ │ │1.7 │23.5│ 3 │ 1 │ .015│ │ │ 18│.002 │ │ 4.0│2.25│ │ 3 │ 2 │ .018│ │ │ 18│.0008 │ │ 2.0│1.1 │ │ 4 │ 1 │ .015│ 2.0│ 2.5│ │ │ │ │ │12 │.00475 4 │ 2 │ .011│ 2.0│ 2.5│ │ │ │ │ │12 │.0022 5 │ 1 │ .015│ │ 5.0│ 36│ │ │ 35.0│ │ │.0038 6 │ 1 │ .018│ │ 5.0│ │.001 │ │185.0│ │80 │ 7 │ 1 │ │ 3.0│ │ 18│.002 │0.019│ │1.7 │ │ 7 │ 2 │ │ 50.0│ │ 36│.005 │ .012│ │7.0 │ │ 8 │ 1 │ │ 6.0│ 2.5│ │.003 │ .018│ │ │21 │ 9 │ 1 │ │ │ 4.2│ 66│.00059│ .011│100.0│ │ │ ─────┴───────┴─────┴─────┴────┴────┴──────┴─────┴─────┴────┴────┴────── _If n is given and is not equal to .015_ the solution is not so simple. In Fig. 15 and 16 the diagram is so drawn that the _position_ of the diameter scales for all values of _n_ is fixed on the vertical “diameter” line. The _scales_ of diameter change for each value of _n_. These scales of diameter are shown for each value of _n_ from .010 to .020 on vertical lines to the left of the “diameter” line. For use, the proper diameter scale for any given value of _n_ must be projected horizontally upon the vertical “diameter” line. The velocity can be determined on Fig. 15 and 16, _only when the diameter has been determined_ and then _only when the diameter scale for n equal .015 is used, since the only scale shown for velocity is for n = .015._