Set of 8: Large Haldenwanger Evaporating Basins Porcelain 109/9 Heating 2 liter

Description

Set of 8: Large Haldenwanger Evaporating Basins Porcelain 109/9 Heating 2 liter. Shipped with USPS.
Hemispherical Diam. 250mm Height 100mm Cap. 2000ml
Haldenwanger Evaporating Basin Porcelain 109/9 with spout.
These are large with 2 liter capacity with over 10 inches in outside diameter (this is 250 mm), and tall, 4+ inches outside (This is 100 mm).
Never used, New Old Stock;  these are glazed on the interior and upper exterior.
More
An evaporating basin is a tool used in labs to separate liquids and solids from a solution by allowing the water to evaporate off into the air. The result is either a more concentrated solution or the solid precipitate or crystals of the dissolved substance.
It looks like a bowl (made of ceramic) with a pour spout. Sometimes they're also called an evaporation dish.
They're made from thermally-stable porcelain that's glazed inside for easy cleaning.
Use porcelain evaporating dishes to heat chemical solutions and drive off the solvent, leaving behind the residual chemical solute. This is usually done by heating the evaporating dish. For example, these are sometimes used to evaporate aqua regia when refining gold.
1. Similar to Coors porcelain.