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Tactile Alphabets
A tactile alphabet is a system for writing material that the blind can read by touch. While currently the Braille system is the most popular and some materials have been prepared in Moon type, historically, many other tactile alphabets have existed: *Systems based on embossed Latin script, Roman letters: **Moon type **Valentin Haüy's system (in italic script, italic style) **James Gall's "triangular alphabet", using both capital and lower-case, which was used in 1826 in the first embossed books published in English language, English **Edmund Frye's system (capital letters only) **John Alston's system (capital letters only) **Jacob Snider, Jr.'s system, using rounded letters similar to Haüy's system, which was used in a publication of the Gospel of Mark in 1834, the first embossed book in the United States. **Samuel Gridley Howe's boston line letter, Boston Line using lowercase angular letters, influenced by Gall's system but more closely resembling standard Roman letters **Juliu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Six Principal Systems Of Embossed Type
6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number. In mathematics A six-sided polygon is a hexagon, one of the three regular polygons capable of tessellation, tiling the plane. A hexagon also has 6 Edge (geometry), edges as well as 6 internal and external angles. 6 is the second smallest composite number. It is also the first number that is the sum of its proper divisors, making it the smallest perfect number. It is also the only perfect number that doesn't have a digital root of 1. 6 is the first unitary perfect number, since it is the sum of its positive proper unitary divisors, without including itself. Only five such numbers are known to exist. 6 is the largest of the four Harshad number, all-Harshad numbers. 6 is the 2nd superior highly composite number, the 2nd colossally abundant number, the 3rd triangular number, the 4th highly composite number, a pronic number, a congruent number, a harmonic divisor nu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
