574 THE LIFE OF JAMES 7). FORTIES. [APPEND. 



drum, from the Observations of John Caldecott, Esq. Brit. 

 Assoc. Rep. 1847 (pt. 2), p. 40. 



102. Twelfth Letter on Glaciers : On the extraordinary In- 

 crease of the Glacier of La Brenva (1842-46) ; its Motion. Expe- 

 rimentum crucis respecting the Origin* of the Veined Structure. 

 Edinb. New Phil. Journ. XL1L, 1847, pp. 94-104; Bibl. Univ. 

 Archives, IV., 1847, pp. 163-166, 366-374; V., 1847, pp. 14- 

 18. 



103. Thirteenth Letter on Glaciers : Acceleration of Surface 

 Motion ; new Determination of Velocity of different Glaciers ; 

 Conversion of Nev into Ice ; Ejection of Stones from Glaciers. 

 Edinb. New Phil. Journ. XLIL, 1847, pp. 136-154. 



104. Fourteenth Letter on Glaciers : On the Variation of tin- 

 Motion at different Seasons. Edinb. New Phil. Journ. XLIL, 

 1847, pp. 327-343. 



105. Fifteenth Letter on Glaciers; containing Observations on 

 the Analogies derived from Mud Slides on a large Scale, and from 

 some Processes in the Arts, in favour of the Viscous Theory of 

 Glaciers. Edinb. New Phil. Journ. XLVL, 1840, pp. 139-149. 



106. On a possible Explanation of the Adaptation of the Eye 

 to distinct Vision at different distances. [1844-45.] Edinb. 

 Roy. Soc. Trans. XVI., 1849, pp. 1-6. 



107. Account of some Experiments on the Temperature of the 

 Earth at different Depths and in different Soils, near Edinburgh. 

 [1846.] Edinb. Roy. Soc. Trans, XVI., 1849, pp. 189-2.".r,. 



108. Hints towards a Classification of Colours. Phil. Mag. 

 XXXIV., 1849, pp. 161-178. 



109. Notices. (1.) On an Instrument for measuring the Ex- 

 tensibility of Elastic Solids. (2.) Note respecting the refractive 

 and dispersive power of Chloroform. (3.) Note regarding an 

 Experiment suggested by Prof. Robison. Phil. Mag. XXX V., 

 1849, pp. 92-96. 



110. On the Danger of superficial Knowledge, a Lecture. 

 London, 1849. 



111. On the alleged Evidence for a physical Connexion lu'- 

 tween Stars forming binary or multiple Groups, deduced from the 

 Doctrine of Chances. Phil. Mag. X X X V 1 1., 1850, pp. 4(> 1-427. 



112. Note respecting the Dimensions and refracting power 

 of the Eye. Goodsir, Ann. Anat. Phys. 1850-53, pp. 44-48 ; 

 Edinb. Roy. Soc. Proc. II., 1851, pp. 251-253. 



113. Sixteenth Letter on Glaciers: On the Movement of the 

 Mer de Glace; Observations by Balmat; on the gradual Passing 

 of the Ice into the fluid State ; an un described Pass of the 

 Alps. Edinb. New Phil. Journ., L., 1851, pp. 167-174. 



114. Further Remarks on the intermitting Brine Springs 



