Within the trabeculae of the sponge-work blood circulates, and between the trabeculae the water passes,.
the Weir, the condensing water circulates upwards through the tubes; in others, e.g.
In these storms the wind invariably circulates from north by west through south to east.
In its original form, this consists of a long tube surrounded by an outer tube so arranged that cold water circulates in the annular space between the two.
Of other common types of condenser, we may notice the "spiral" or "worm" type, which consists of a glass, copper or tin worm enclosed in a vessel in which water circulates; and the ball condenser, which consists of two concentric spheres, the vapour passing through the inner sphere and water circulating in the space between this and the outer (in another form the vapour circulates in a shell, on the outside and inside of which water circulates).