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British Library MS. Sloane 2579. Parchment. Small Quarto. 117 folios. 15th Century. 1. De septem artibus liberalibus tractatus, cui titulus 'Secretum Philosophorum' ff.2-47.
Prologue begins: 'Iste liber quem prae manibus habes vocatur Secretum Philosophorum, quia in eo continentur..'.
Treatise begins: 'Grammatica docet recte scribere er recte loqui, ex quo patet quod dividitur in duas partes.' Desinit abrupte ad capitulum de arte metrica, cum his verbis: 'Et quia in partibus nostris talibus instrumentis nullus utitur, propterea de profundymetria ulterius no procedam'.
2. Tractatus de quatuo elementis. ff.47-50.
Begins: 'Quatuor sunt elementa - ignis, aqua, terra et aer'.
3. Processus chymici, recepta et experimenta plurima. ff.50-99.
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