Scientific American Supplement, No. 803, May 23, 1891 by Various
page 85 of 143 (59%)
page 85 of 143 (59%)
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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. --------------------------------------------------------------------- | | | | | | 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 .| | | | f e | | | | | g | | | | d | --+-----------------+---------+-------+-------+------+------+-------| | | | yards. | atm. | atm. | | | | |1|Southern reseau | | | | | | | | | to Place de la | | | | | | | |
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