But even filters of this type, if they are to be fully relied upon, must be frequently cleaned and sterilized, and great care must be taken that the joints and connexions are watertight, and that the candles are without cracks or flaws.
In this several microphonic joints were employed.
The intervertebral joints are further complicated by the interposition of a cartilaginous or fibrous pad or ring.
Bridges Adams, the intention being by " fishing " the joints to convert the rails into continuous beams. In the original design two chairs were placed, one under each rail, a few inches apart, as in fig.
The joints of flanged rails are similar to those employed with bull-headed rails.