Professor Riedler investigated the two causes of loss in the
mains--leakage and resistance. It was superficially evident that the
mains of the old system were so well laid, and the joints so well
designed, that the loss from leakage was never a serious one. In
order, however, to ascertain the amount accurately, a series of
careful experiments were carried out by Professor Gutermuth with the
11.81 in. mains of the St. Fargeau system.
EXPERIMENTS ON LEAKAGE IN MAINS.
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| | | | | | L P A |
| | | | Air Pressure | Loss of | o e i |
| | | | in Mains. | Pressure. | s r r |
| | | |---------------|-------------| s |
| | | | B | | | | C D |
| |System of Mains | Length. | e T| | | | o e e |
|N| Tried. | | g r| At | | | f n l |
|u| | |A i o i| End |During| Per | t i |
|m| | |t n f a| of |Trials|Hour. | A . v |
|b| | | n l|Trials.| | | i e |
|e| | | i s| | | | r o r |
|r| | | n .
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