This is a normal process with cast-iron piping, called tuberculation. The bacteria in the wastewater from the toilet causes a reaction with the iron on the inside of the diameter of the piping, and ...

Asbestos-Cement Pipe, In Addition to Being Highly Resistant to UnderGround Corrosion, Is Free of Tuberculation and Excessive Ground-Water Infiltration. Added Up, These Features Mean Long Useful Life ...

Very close to Echinotiara in appearance and tuberculation style, differing primarily in having offset pore-pairs forming a broad band from the apex. In Echinotiara the pore-pairs form a single ...

An account of the histology of the skin of the disc is given. The cornification, and later tuberculation, of the posterior region of the disc is shown to be correlated with the habits and habitats ...

Remarks Although no lantern has yet been described from this taxon, it seems likely that Heterodiadema is a diadematoid, based on its tuberculation and deep buccal notches. It is very close to ...