Position six of six
The Index
All 27 guides, in the order the cell numbers them. Every piece on this site is reachable from here without a menu.
Position 1
The Six Dots
- 01Six Positions. Sixty-Four Patterns.Walks through the combinatorics of the six-dot cell — why 64 states exist, how they are distributed across the character set, and which positions…4 min
- 02Why the Dots Are Numbered the Way They AreExplains the standard 1-through-6 numbering convention, its spatial layout, and why an eight-dot extension adds 7 and 8 at the bottom rather…2 min
- 03What Came Before the CellSurveys the embossed-letter systems — Moon, Boston Line Type, Edinburgh — that preceded the six-dot cell, and argues the cell won because…4 min
- 04The Night-Writing ProblemDescribes Charles Barbier's sonographic system, why it failed for the purpose Barbier intended, and how Louis Braille's reduction of the…3 min
- 05Grade One Is a Complete Writing SystemMakes the case that uncontracted braille is not a simplified version of contracted braille but a fully specified orthographic system in its own right.2 min
- 06Why the Cell Is Not BiggerExamines the physiological and ergonomic constraints — fingertip resolution, lateral sweep speed, cell spacing — that set the upper bound…6 min
Position 2
Contractions
- 01Why Contracted Braille ExistsExplains the primary driver — embossed paper is thick and braille books are large — and traces how the compression logic was formalised.2 min
- 02Three Kinds of ShortcutDistinguishes whole-word contractions, part-word contractions, and composition signs, showing with correct cell examples how each category works…4 min
- 03The Cost of Contractions for Readers Moving Between Print and BrailleArgues that the compression gains of contracted braille come with real processing overhead for readers moving between print and braille literacy,…3 min
- 04When Two Rules Want the Same CellWalks through specific conflict cases in English braille where a sequence of letters could satisfy more than one contraction rule, and explains…3 min
- 05What Unified English Braille Actually UnifiedCompares the pre-UEB English braille code to UEB on the specific question of contractions — what was dropped, what was retained, and why the proces…7 min
- 06The Words Contractions Cannot ShortenIdentifies the classes of text — proper nouns, technical vocabulary, mixed-script content — where contraction rules produce ambiguity or silence,…2 min
Position 3
Notation
- 01How Nemeth Code Encodes MathematicsExplains the structural logic of Nemeth Code — mode switching, the spatial problem of two-dimensional notation in a linear medium, and how fraction…6 min
- 02Music Braille Has No StaffDescribes how music braille encodes pitch, duration, dynamics and phrasing without any analogue of the five-line staff, and why bar-over-bar format…4 min
- 03Nemeth or UEB Maths: What the Difference Actually IsCompares Nemeth Code and UEB technical notation on specific mathematical expressions, showing where they produce different cell sequences…3 min
- 04Chemistry's Notation ProblemExamines the specific challenge structural chemical formulae pose for any linear braille code and describes the conventions different national…2 min
- 05Who Decides What a Cell Means in MathsDescribes the governance process by which specialised notation codes are created, revised and adopted — the organisations involved, the timescales…4 min
Position 4
The Machines
- 01How a Piezo Cell Raises a DotExplains the piezoelectric actuator mechanism used in refreshable braille displays — bender disc, push-rod, pin geometry, actuation voltage…7 min
- 02The Perkins Brailler from the InsideDescribes the mechanical action of the Perkins Brailler — the seven-key embossing head, the paper-feed ratchet, the back-spacing mechanism…3 min
- 03Right to Left, Dot Side DownExplains why writing with a slate and stylus requires the writer to work right-to-left and from the back of the cell, and describes the design…2 min
- 04How an Embosser Punches a PageDescribes the mechanical and electronic stages of desktop braille embossing — translation, rasterisation, solenoid or piezo head, interpoint regist…4 min
- 05Why Paper Braille PersistsArgues that refreshable braille displays, despite their obvious advantages, have not displaced paper braille, and examines the specific properties…3 min
- 06Braille Displays and the Linux Driver ProblemDescribes the historical challenge of writing reliable driver software for braille displays on Linux, mentioning the libbraille C library…2 min
Position 5
Tactile Beyond Braille
- 01What a Raised Line Can and Cannot ShowExamines the production constraints and perceptual limits of raised-line diagrams — swell paper, vacuum-formed overlays, microcapsule paper…4 min
- 02Where the Paving Is StandardisedSurveys the international standards that govern tactile ground surface indicators — blister patterns for hazard, bar patterns for direction…4 min
- 03Reading Is a Tracking Problem Before It Is a Decoding ProblemArgues that the primary cognitive load in tactile reading — whether braille text or a raised diagram — is spatial tracking rather than symbol recog…6 min
- 04Tactile Maps Need Real CoordinatesExplains why tactile maps must be drawn from accurate survey data rather than schematised — the perceptual cost of topological distortion is higher…2 min