EXPERIMENT XIX.
TO shew that Colours may be alter'd, with∣out any Change in the Chymical Princi∣ples of a Body, I shall urge, that essen∣tial Oyls or Spirit of Wine being shaken, till
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TO shew that Colours may be alter'd, with∣out any Change in the Chymical Princi∣ples of a Body, I shall urge, that essen∣tial Oyls or Spirit of Wine being shaken, till
Bubbles rise, they will afford, as long as they last, very lively Colours, and so does Water and Sope, made into Bubbles by Children; and so will Bubbles in Oyl of Turpentine and thin ones blown of Glass. And I have discern'd several Rainbows represented, by holding before my Ryes and the Sun, a Feather or a Piece of black Ribband.