Dobereiner discovered the combination of SO 2 and 0 into SO 3 by means of spongy platinum.
Moreover, unless the conditions are closely watched, it is liable to be thrown down in a spongy form.
Has light grey or brown close thick wool half an inch deep without any top hair, with a rather thick spongy pelt.
In order to make spongy or porous rubber, some material is incorporated which will give off gas or vapour at the vulcanizing temperature, - such as carbonate of ammonia, crystallized alum, and finely ground damp sawdust.
By the addition of sodium amalgam to a concentrated solution of ammonium chloride, the so-called ammonium amalgam is obtained as a spongy mass which floats on the surface of the liquid; it decomposes readily at ordinary temperatures into ammonia and hydrogen; it does not reduce silver and gold salts, a behaviour which distinguishes it from the amalgams of the alkali metals, and for this reason it is regarded by some chemists as being merely mercury inflated by gaseous ammonia and hydrogen.