One of the great public works of Boston is its subway for electric trams, about 3 m.
An excellent service of electric trams interconnect the towns of Hamburg, Altona and the adjacent suburbs, and steamboats provide communication on the Elbe with the riparian towns and villages; and so with Blankenese and Harburg, with Stade, Gliickstadt and Cuxhaven.
Mules are universally employed for animal traction, and narrow gauge lines with single-mule trams are generally used where the traffic is light.
The jinrikisha, drawn by one man or sometimes two men, which were formerly the chief means of passenger conveyance, have notably decreased in number since the introduction of the trams. Tokyo has often experienced earthquakes, and more than once has suffered from severe shocks, which have hitherto prevented the erection of very large buildings.