| England, Turk head brick tower mill. | South of England, wood tower mill. | Holland, tower mill. | Holland, turntable type. |
| France, tower mill. | France, hybrid mill. | Belgium, tower mill. | Hungary, tower mill. |
| Mediterranean, tower mill. | Plain, post mill. | Belgium, post mill. | Barbadoes, tower mill. |
| Rhode Island, wood tower mill. | Long Island, wood tower mill. | Sweden, wood tower mill. | Turkey, stone tower mill. |
| [TYPICAL WINDMILL HEADS.] | |||
![[TYPICAL WINDMILL HEADS.]](#2464185526814227863_i_08_lg.png.id-5152919118881523557.wrap-0.html.html){kind=link}
Sometimes a tower mill would be constructed on a circular timber framework or base, carried on rollers or iron balls, forming a large turntable, enabling the turning of the entire edifice to the wind, as need be, the same as a locomotive turntable or a rotary drawbridge is turned. This therefore parallels the post
| Usual canvas covered sweep. | England, Bywater’s rolling canvas. | England, Cubit’s patent shutter. | England, Meikle’s spring sweep. | England, double shutter. |