Memoirs presented to the Cambridge philosophical society on the occasion of the jubilee of Sir George Gabriel Stokes, bart., Hon. LL. D., Hon. SC. D., Lucasian professor.

304 PROF. LIVEING, EFFECTS OF DILUTION, TEMPERATURE, ETC. ON THE
A weak band at about X527.
A very strong one at about X 523.
A weaker one at about X520.
A rather broad band, strongest on its more refrangible side and fading towards
the less refrangible, with its strongest part at about X 491.
A strong band at about X 488.
A weaker one at about X486.
A broad but weak band with its centre about X472.
A sharp but weak band at about X 467.
A broad, diffuse band with centre about X 454, reaching almost up to a stronger, and
narrower, band at about X 449. These two are merged into one with concentrated
solutions.
A weak band at about X 441.
A narrow one at about X 422.
A weak one at about X 418.
A broad band, fading on its less refrangible side, and extending from about X 415
nearly down to the band at X418.
A pair of nearly equal bands, rather strong, at about X 404 and X 407.
A very faint but broad band extending from about X:396 to X 402.
A well-marked, rather narrow band at about X379,
And a weaker one almost touching it on the more refrangible side, which
becomes merged with it, and with a still weaker diffuse band at about X 377, in solutions a little stronger.
A weak diffuse band with centre about X 367.
A strong band at about X365, accompanied by
One rather less strong at about X363, which become merged together when the
solution is rather stronger.
A band rather weaker than the last at about X 357, and
A broad weaker band with centre at about X353, which soon merges in the former
when the solution is a little increased in strength.
All these bands more refrangible than X 404, expand rapidly and become very
diffuse at the edges as the solution is more concentrated, so that they may easily be