Rensselaer Republican, Volume 27, Number 32, Rensselaer, Jasper County, 16 April 1896 — Heat-Proof Glass. [ARTICLE]

Heat-Proof Glass.

It is said that a new glass has been manufactured, that, while it allows the free passage of light, Is a decided check to heat. In an experiment it was proven that a glass plate four-tenths cf an Inch thick allowed but four and sixtenths per cent, of radiant heat to pass through it. A very thin slab of this glass allowed less than one per cent of beat from gas to pass through It, although It permitted the transmission of twelve per cent, of heat from sunlight. If this glass is an equal bar to cold, it Is a ’discovery that revolutionize building and many other of tbe arts. The glass contains iron In tbe form of ferrous chloride.