Blendingly

Who in the rainbow can draw the line where the violet tint ends and the orange tint begins? Distinctly we see the difference of the colors, but where exactly does the one first blendingly enter into the other? So with sanity and insanity.

[…] the "tuba mirabilis", a magnificent stop, from over-pressure speaks so peremptorily that it is impossible to introduce it harmoniously or blendingly, as it stands out immediately alone.

Who in the rainbow can draw the line where the violet tint ends and the orange tint begins? Distinctly we see the difference of the colors, but where exactly does the one first blendingly enter into the other? So with sanity and insanity.