arrows in Chemistry and Nemeth

[Chris Clemens]

I just realized that the arrows in Chemistry code and Nemeth are different. In example 2 below, should the arrow be dots 4-5-6, 2-5, 1-3-5, 1-2-4-5-6?

How about example 1? In “Braille Code for Chemical Notation 1997”, it states the Jagged, horizontal is dots 5, 2-6, 3-5, 2-6, 3-5, but it did not say anything about the jagged arrow. Should the Nemeth code dots 1-2-4-6, 3-5, 2-5, 2-6, 1-3-5 be used? Or something like 4-5-6, 5, 2-6, 3-5, 2-6, 3-5, 1-3-5?

1. CH4 + O2 ~~~~> CO2 + H2O
2. CH4 + 2O2 -> CO2 + 2H2O

Thank you

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[Chris Clemens]

The Nemeth code is based primarily on the presentation, appearance, or notation of the mathematics, in contrast to semantics. As Dr. Nemeth has written,

A Nemeth Code transcriber need not be proficient in mathematics; all that is required is to look up the symbols and follow the rules. That is what has attracted so many transcribers and what accounts for such a large collection of braille books in math and other natural sciences. Braille Into the Next Millennium

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edited by william.parkar on 4/10/2010

[Chris Clemens]

Hi,

I've consulted a Chemistry Specialist about this and we have need more information. Could you provide a copy of this material so that we can look at the page? Was it made up by a teacher or part of published material?

Thanks, Mary

[Chris Clemens]

I attached a file which contains 2 questions. This is a WORD file from the science teacher.

[Chris Clemens]

Any arrows in Chemistry that are not listed in section 3 of the Chemistry Code must be transcribed as in Nemeth Code. If you look at Rule XXI--Arrows (Nemeth Code), the construction of a wavy arrow shaft is shown. Your arrow would have a normal right pointing arrowhead.

[braille]$935o

If length is significant, you may extend the shaft length by repeating the arrow-shaft symbol a suitable number of times.

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