Methylene Blue, methylthionine chloride or 3,7-bis(dimethylamino)phenothiazin-5-ium chloride is a chemical compound used as a dye and medication for Gram's stain, Wright stain[?], and the treatment of metoxyhemoglobinemia.
... He also
gives prayers to Mary (cf. the De tabernaculis, and
Hortus rosarum, Pohl's ed., ut inf., i. also iii. 357,
vi. 219, 235 sqq.).
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