Night writing visited the National Institute for the Blind in Paris, France, where he met Louis Braille. Braille identified the major failing of the code, which was that the human finger could not encompass the whole symbol without moving and so could not move rapidly from one symbol to another. His modification was to use a six-dot cell, the Braille system that revolutionized written communication for the visually impaired. Night writing Night writing, a.k.a. sonography, was a system of code that used symbols of twelve dots arranged as two columns of six dots embossed on a square of paperboard, and is now
Mini blind devices which are used to upgrade the blind but is not considered the safest alternative according to the US.CPSC, who recommends using only cordless window coverings in homes where small children live or visit. Blinds with wand tilt are safer than blinds with traditional cord tilt. There are also cordless blinds. The dangling group of pull cords is replaced by a spring motor system. A push or pull on the bottom bar raises or lowers the mini blind rather than using pull cords. Slats are made by continuous casting. Casting is the pouring of molten metal or plastic into a