2655: Long S Outside Writing Systems Mar 25, 2022

While naturally the long s ⟨ſ⟩ character was used in handwriting, print, and in ligatures, outside of specific writing systems it’s also had other functions. was the symbol of the shilling when that was part of British currency, though this has largely been replaced with a / symbol. ⟨ſ⟩ is used in mathematics for integrals, though this is a stylized form based on the italicised version /ʃ/, hence the tail at the end and no x-height nub. In the International Phonetic alphabet, the same italicised version /ʃ/ is used to represent the first found in 'SHort'.

This is the final post in a series about the long-s. To read all of them together, click here.

2654: Lingering Traces of Long S Mar 24, 2022

While usage of the long s ⟨ſ⟩ declined sharply after the start of the 19th century, but it did not totally disappear. First of all, it was used in the alphabets as its own letter—that is, not as a variant of 'S'—such as in various writing systems of Slavic and Caucasian languages even into the early 20th century; Turkmen used it for its Latin script as its own letter before that was replaced with 'ž'. Moreover, it is still found as a ligature making up the German ß (sz) though this has long been considered its own letter.

Moreover, outside of specific writing systems, it was the symbol of the shiling when that was part of British currency, though this has largely been replaced with a / symbol. ⟨ſ⟩ is used in mathematics for integrals, though this is a stylized form based on the italicised version /ʃ/, hence the tail at the end and no x-height nub. In the International Phonetic alphabet, the same italicised version /ʃ/ is used to represent the first found in 'SHort'.

2521: abacus Nov 7, 2021

The word 'abacus' came to English from Latin hence the plural 'abaci', but this word might really have a semitic origin. While now the term is used exclusively to refer to the mathematical instrument, it used to be more generic, denoting many types of boards including board-game boards and sand tables, as with the Ancient Greek ἄβαξ (ábax). This has been likened to the Hebrew אבק‎ (āvāq) meaning 'dust' which would explain the senses of the Catalan 'àbac' meaning both 'mathematical table' and 'board covered in sand'.

2514: calcium & calculus Oct 31, 2021

The words 'calcium' and 'calculus' are related by the common root of 'calx', or translated from Latin, 'limestone'. This makes a certain amount of sense for calcium, since this is an element and is found physically in limestone and even now is another term for kidney-stones, but the association to mathematics is not as clear. This is because the diminutive form of 'calx' took the suffix '-ulus', resulting in 'calculus' meaning 'pebble', which again doesn't seem to relate to math, but is a reference to the stones used as counters on an abacus. Before differential calculus took the more specific definition used today, 'calculus' could just mean 'to calculate', hence the relation there as well.

2299: Hebrew's Alternative Plus Sign: ﬩ Apr 2, 2021

Numbers in modern Hebrew writings, including in math equations, are written left-to-right, even though Hebrew is written right-to-left. This means that math and numerals in general are exactly the same as in Europe for instance, with one exception. The plus-sign, conventionally + for most places, is often written ﬩ as a sort of inverted capital T. This is because historically, the Jews using the symbol wanted to avoid writing something that resembled a Christian cross but even in secular settings now the symbol remains present.