Tanks and pots are both used for melting the glass.
Large tanks of boiler-plate are used to receive the oil as it comes through the pipe-lines.
This is easily done in liming or measuring tanks of known capacity, into which the juice is run from the mill.
Since then it has been discovered in other botanic gardens in various parts of Europe, its two most recent appearances being at Lyons (1901) and Munich (1905), occurring always in tanks in which the Victoria regia is cultivated, a fact which indicates that tropical South America is its original habitat.
In the same tanks a small hydroid, very similar to Microhydra, has been found, which bears medusa-buds and is probably the stock from which the medusa is budded.