d of High street. The overhanging willows and shallop are at the site of the Woods dam and tide-mill, at one time famous in Medford boating annals.
Beneath this bridge the tides surged swiftly to and fro.
The lower left view shows the Lowell railroad embankment, built in 1834, across the marshland of Charlestown (now Somerville) on the right, looking down stream.
The lines of the river bank are here much changed, but the stone arch remains, embedded in the newer one of concrete, built in 1906.
The upper right-hand view is Canal bridge, over which Boston avenue was built in 1873.
There were four spans, in all one hundred and thirty-four feet, the length of the first canal aqueduct, which was here built in 1802.
Renewed in 1827, on the old abutments and on three new granite piers, it remained disused from 1852 to 1873, gradually becoming a picturesque ruin, until utilized as here seen.
The name was given it by the city government, at the request of the Historical Society, in 1