Minutes of Proceedings. 
17 
whicli was tlie most striking characteristic of the intellect of Dr. 
Jellett. Among his other mathematical publications may be especially- 
mentioned those relating to inextensible surfaces, as of great interest 
and value ; as also his book on Friction, which was published in 1872 ; 
but probably a surer foundation for his scientific reputation will 
be found in his invention of the beautiful and delicate instrument 
called the Double -plane Analyser, and in his application, by means of 
this instrument, of the properties of polarized light to the investiga- 
tion of the difficult and unsolved problem of the nature of chemical 
union. The science of chemistry, viewed from the standpoint of 
mathematical physics, is yet in its infancy, and to trace the connexion 
between the chemical properties of matter and its primary qualities 
must be ^the work of some ITewton of the future ; but of those who 
have striven to clear the way for the final discovery, there is probably 
none who has made a more original and successful attempt than Dr. 
Jellett. The investigations described in his Paper on Chemical Optics, 
in which the properties of polarized light are employed to discover the 
nature and laws of chemical equilibrium, exhibit a remarkable union 
of theoretical and experimental skill. 
It does not come within the scope of this notice to treat of 
Dr. Jellett's theological writings, which, of course, could not be left 
out of consideration in any complete estimation of the labours of the 
late Provost. As a speaker, however, it may be said that he never 
addressed an audience without making a deep impression by his lucid 
statement and logical enchainment of the reasons that guided him 
to a decision on any disputed point; his earnest manner, outspoken 
without bitterness, his quiet, yet forcible oratory, always rivetted the 
attention of his hearers ; but it was, above all, his transparent truth- 
fulness that was his highest charm ; nor can greater praise be given to 
a man placed in a position of responsibility and authority than this — 
which can assuredly be said of Dr. Jellett — that, alike, his supporters 
and his opponents felt and acknowledged him to be always and in 
all things a man of absolute integrity. 
Appended is a list of Dr. Jellett's Papers in the Academy. 
Papers published in the Transactions : — 
" On the Equilibrium and Motion of an Elastic SoHd." 
" On the Properties of Inextensible Surfaces." 
"Eesearches iu Chemical Optics." 
lUI.A. MINUTES, SESSION 1887-8. [2] 
