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.

(v:i)u:Jdge Ph/ilosoph.acl..2antsactiols., o. t [''F]L, Pla te 13,
PLATE 1 3.
-bso13pt3ils.t by >soli.on of erbiu-ri. icldoride, cold. antd l:t alteri.itel}t, iln t-wo degrit: s f on centre itiou.
cô~ s f i C C lhalf-strenotli solution
i "C~~~~~~LI~~~~76 mi. thick t 23 C.
hlf-i strenugtli solution
2 76 ino. thiek aet 97'0 (
stronger solution
3 i)~~~~~~~~.ie mmO:~~38. th. ie 25 ' -C
s-ir onger sutlution
38 inu. thiick at 9 C.
Tlhe extensionr i then general absolpti( n at thc more refranrile end of thié slpectri iii) hy rise of
ter-pen> ture is ueaniest liu these ulotorplihs, and st v the greater diff-senless f tti bands at a-:dbout X449
t-d À488.