Annual report of the State Board of Health, Lunacy, and Charity of Massachusetts . 1883.] THE SEWERAGE OF NAHANT. 233 be dragged to and fro, until the whole mass of sediment wasloosened. These appliances, except the shingle and candle, are theones ordinarily in use for pipe sewers, and were found tol-erably satisfactory, though not wholly so. To meet thewant still felt, circular brushes of various sizes that couldbe attached to a rope or a rod and then pulled or pushedthrough, were devised ; at first, these were made of stiffbristles, but now are constructed of flat steel wires, fastenedto a w
Annual report of the State Board of Health, Lunacy, and Charity of Massachusetts . 1883.] THE SEWERAGE OF NAHANT. 233 be dragged to and fro, until the whole mass of sediment wasloosened. These appliances, except the shingle and candle, are theones ordinarily in use for pipe sewers, and were found tol-erably satisfactory, though not wholly so. To meet thewant still felt, circular brushes of various sizes that couldbe attached to a rope or a rod and then pulled or pushedthrough, were devised ; at first, these were made of stiffbristles, but now are constructed of flat steel wires, fastenedto a wooden core (see Fig. 6), and with the arrangementsbefore mentioned appear to be sufficient for all being once thoroughly cleaned, the question of keep-ing the sewers in that condition was much simplified. Inspection now consists either in reflecting the sunlightthrough the sewer, from one manhole to another, by meansof mirrors (see Fig. 7), which enable a very fair inspec-tion without auy flush whatever, or in the use of the shingleand candle before mentioned. If
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