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Mellon Collection, Yale University Library MS. 127. 71 folios. Paper. 320x203mm. 18th Century [c. 1780.] Georg von Welling. 'The rise and origin of common salt' [an extract from Opus mago-cabalisticum et theosophicum, part I, anonymously translated into English.]
[This is continued in Mellon MS. 128.]
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