PRESIDENTIAL ADDRESS. 307 



When we are once afloat, let us go forward in the spirit of true discoverers, 

 not obsessed with preconceived ideas of what we are going to find, but with 

 minds open to all that may present itself so that, whatever happens' as we go 

 onward, we may add some small trifle to the general store of knowledge. 



And what qf all those who have sailed forth and suffered shipwreck or 

 returned empty ? Are they to be pitied ? No, if they were of the real stuff, all 

 they asked and what they got was — 



' A tall ship and a star to steer her by j 

 And the wheel's kick and the wind's song and the white sail's shaking, 

 And a gi'ey mist on the sea's face, and a grey dawn breaking.' 



The joy of sailing upon the ocean of discovery— that to the man of science 

 is the real joy of life. 



» Biochem. Jour. 10, 1916, 543. 



== J. of Phys. 52, p. 1, 1918. 



s Ztscli. f. p/itjs. C'/iem. 41, p. 321, and 42. p. 181, 1904. 



* /. of Phyii. 33, p. 106, 1905-06. 



= Ztsch. f. pliys. C/ie/ii. 81, p. 71, 1912. 



'V. of Phys. 51, p. 347, 1917. 



' Biochem. Jour. 10, p. 263, 1916. 



« Ztsch. f. phy.'f. Chmii. 86, p. 435, 1913. 



» /. of Biol, all em. 24, p. 23, 1916. 

 '» J. of Phys. 52, p. 1, 1918. 

 " Barger, Simpler Natural Bases, p. 79. 

 '= Quart. J. of Exp. P/iijs. 10, p. 315, 1916. 

 " Loc. cit. 



" /. of Biol. C/iem. 3, p. 21, 1907. 

 '•' /. of Phys. 52, p. 70, 1918. 

 "> /. of Phys. 52, p. 1, 1918. 

 " Ztsch. f. phys. Ghem. 48, p. 430, 1906. 

 '8 Ztsch. f. phys. Chem. 52, p. 225, 1907. 

 '» /. of Phys. 51, p. 360, 1917. 

 -" /. of Phys. 45, p. 115, 1912. 

 = ' /. of Biol. Chem. 10, n. 479, 1911-12. 

 -- Biochem. Jour. 10, p. 495, 1916. 

 -3 J. of Phys. 39, p. 485, 1910. 

 2' 7. of Biol. Chem. 15, p. 283, 1913. 

 " /. of Biol. Chem. 18, p. 195, 1914. 

 -» /. of Biol. Chem. 17, p. 500, 1914. 

 -^ J. of Phys. 44, p. 43, 1912. 

 =« Ztsch. f. phys. Chem. 57, p. 476, 1908. 

 ^» /. of Phys. 39, p. 299, 1909. 

 =0 /. of Phys. 41, p. 276, 1910. 

 ■■" /. of Phys. 48, Proc. 1914. 

 '■'- J. of Phys: 33, p. 1, 1905. 



The following Paper was then read ' : — 



The Measurement of Emotion. By A. D. W.\ller, M.D., F.E.S. 



(With Dem.onsiration.) 



[Plate IV.] 



Any emotion, spontaneous or pix)voked, causes nerve impulses through 

 efferent channels to the skin— of the palm of the hand especially — which undei- 

 goes a sudden diminution of electrical resistance, which can be demonstrated 

 and measured by galvanometer. 



The hand of the subject — as quiescent as possible — is placed in the fourth 

 arm of a Wheatstone bridge. Balance having been established, the subject 



' For transactions under the Subsection of Psychology, see p. 313. 



