Catalogue IX
The ninth of its series. The first eight are unavailable for consultation.
The Ninth Catalogue publishes free software, and keeps its own counsel on the rest. Its present entries concern the sky: astronomical tables, the instruments for reading them, and the old books they were taken from. Later entries may concern obscure books, or small machines that fit in the hand. Nothing in it is for sale.
Browser tools, demonstrations and other small works: the celestial sphere, Ptolemy’s models, arithmetic in sixties, and the tables and calculator for casting a chart by hand. Each is a single page: open it, use it, save it if you like.
Explore the collectionA desktop study companion for traditional natal astrology: cast a chart, then check, table by table, what the texts say about it. Every rule it applies names the sentence it comes from.
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