ges on
either side the Shadow was in the full red Light 1/22, and in the violet
1/27 of an Inch. And these distances of the Fringes held the same
proportion at all distances from the Hair without any sensible
variation.

So then the Rays which made these Fringes in the red Light passed by the
Hair at a greater distance than those did which made the like Fringes in
the violet; and therefore the Hair in causing these Fringes acted alike
upon the red Light or least refrangible Rays at a greater distance, and
upon the violet or most refrangible Rays at a less distance, and by
those actions disposed the red Light into Larger Fringes, and the violet
into smaller, and the Lights of intermediate Colours into Fringes of
intermediate bignesses without changing the Colour of any sort of Light.

When therefore the Hair in the first and second of these Observations
was held in the white beam of the Sun's Light, and cast a Shadow which
was border'd with three Fringes of coloured Light, those Colours arose
not from any new modifications impress'd upon the Rays of Light by the
Hair, but only from the various inflexions whereby the several Sorts of
Rays were separated from one another, which before separation, by the
mixture of all their Colours, composed the white beam of the Sun's
Light, but whenever separated compose Lights of the several Colours
which they are originally disposed to exhibit. In this 11th Observation,
where the Colours are separated before the Light passes by the Hair, the
least refrangible Rays, which when separated from the rest make red,
were inflected at a greater distance from the Hair, so as to make three
red Fringes at a greater distance from the middle of the Shadow of the
Hair; and the most refrangible Rays which when separated make violet,
were inflected at a less distance from the Hair, so as to make three
violet Fringes at a less distance from the middle of the Shadow of the
Hair. And other Rays of intermediate degrees of Refrangibility were
inflected at intermediate distances from the Hair, so as to make Fringes
of intermediate Colours at intermediate distances from the middle of the
Shadow of the Hair. And in the second Observation, where all the Colours
are mix'd in the white Light which passes by the Hair, these Colours are
separated by the various inflexions of the Rays, and the Fringes which
they make appear all together, and the innermost Fringes being
contiguous make one broad Fringe composed of