and such are the drops on the Exteriour part of the Primary, and Interiour part of the Secondary Bow.
- The odd Phænomena of an infusion of Lignum Nephriticum, Leaf-gold, Fragments of colour'd Glass, and some other transparently coloured Bodies, appearing in one Position of one Colour, and of another in another, are on these grounds no longer Riddles. For those are Substances apt to reflect one sort of Light, and transmit another; as may be seen in a dark Room, by illuminating them with similar or uncompounded Light. For then they appear of that Colour only, with which they are illuminated; but yet in one Position more vivid and luminous than in another, accordingly as they are disposed more or less to reflect or transmit the incident Colour.
- From hence also is manifest the reason of an unexpected Experiment, which Mr. Hook, somewhere in his Micrography, relates to have made with two wedge-like transparent Vessels fill'd, the one with a red, the other with a