Subtilitatum veriloquia, in quibus proprietatum totius subtsantiae [sic], quae occultae, specificaeque sunt, patefactio promulgatur. Itidem de colore, luce, lumine, perspicuo, transpicuo, opaco, ac de alijs visioni inseruientibus accurate agitur. Ad qua epistola de monstri generatione accedit
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![Cover of [William Wheeler Hubbell, authorized to apply for patents.] by United States. Congress. Senate. Committee on Patents](/img/cover/10200621-M.jpg)
