CONTENTS xi 



PAGE 



'On the Motions of the Human Eye.' Heidelberg, 

 Lecture 218 



1864. Journey to England 22 L 



' On the Normal Motions of the Human Eye in relation 



to Binocular Vision/ (Croonian Lecture.) Proc. Roy. Soc., 

 XIII . ... .224 



' Experiments on Muscular Sounds.' Berlin Academy. 

 1 On Muscular Sound/ (Lecture, Heidelberg.) 



' On the Influence of Rotation of the Eye on the Out- 

 ward Projection of Retinal Images.' (Lecture, Heidelberg.) 



1865. 'On Ocular Movements.' (Lecture, Heidelberg.) 

 ' On Stereoscopic Vision.' (Lecture, Heidelberg.) 



'On the Properties of Ice.' Lecture, Heidelberg. 'On 

 the Regelation of Ice.' Phil. Mag. [4], XXXII . . 228 



1866. Journey to Paris 232 



1867. Handbook of Physiological Optics. Third (final) part 235 

 ' The more recent Developments in the Theory of Vision.' 



Preuss. Jahrb., XXI, 1868 ; Pop. Set. Lect., Series II . 237 



' The relation of Optics to Painting.' Lectures translated 

 in Pop. Sci. Lect., Series II 240 



' Communication concerning Experiments on the Rate of 

 Transmission of Irritation in the Motor Nerves of Man 

 carried out by Mr. N. Baxt of St. Petersburg in the Physio- 

 logical Laboratory at Heidelberg.' (Berlin Academy) . 244 



; On the Period necessary for becoming conscious of a 

 Visual Impression.' Results of an experiment carried out 

 by Mr. N. Baxt in the Heidelberg Laboratory. (Berlin 

 Academy) 245 



'On the Mechanics of the Auditory Ossicles.' (Berlin 

 Academy) 246 



'The Mechanics of the Auditory Ossicles and of the 

 Membrane of the Tympanum.' Pfluger's Arch., 1869 . 246 



Ophthalmological Congress in Paris. Lecture. ' Sur 

 la production de la sensation du relief dans 1'acte de la 

 vision binoculaire ' 247 



Commencement of the translations of Tyndall's lectures 

 and of Thomson and Tait's Natural Philosophy . . . 248 ^_ 



1868. 'On Discontinuous Movements of Fluids.' Berlin 

 Monatsber. ; (trans.) Phil. Mag. [4], XXXVI . . .254 



' Contribution to the Theory of Stationary Currents in 

 Frictional Fluids.' (Lecture, Heidelberg.) 



