704 INDEX. ' 
Torbanehill Mineral, 7, 173. 
Trait (Tuomas §.), M.D. On the Torbanehill mineral, 7. 
U 
Urinary Secretion of Fishes, with some remarks on this secretion in other classes of animals, 543. 
Vv 
Vision. On the extent to which the received theory of vision requires us to regard the eye as a camera 
obscura, 327. 
W 
Wixuams (C. Grevitte). On the volatile bases produced by the destructive distillation of cincho- 
nine, 309. Researches on chinoline and its homologues, 377. ‘ 
Witson (GzorcE), M.D. On the extent to which the received theory of vision requires us to regard 
the eye as a camera obscura, 327. 
Wise (Tuomas A.), M.D. Notes on some of the Buddhist opinions and monuments of Asia, com- 
pared with the symbols on the ancient sculptured “ Standing Stones” of Scotland, 355. 
END OF VOLUME TWENTY-FIRST. 
NeEILu & Co,, Printers, Edinburgh. 
