10 Biographical Memoir of 
12. Mineralogical Description of the Islands of Foula, Papa- 
Stour, Valey, Muckle Rhooe, Vementry. 
We now give a list of a few of the separate Papers that 
appeared in the periodical publications :— 
Nicholson’s Journal. 
13. On Granite. 1802. 
14, On the supposed Existence of Mechanical Deposits in Primi- 
tive Mountains. 1802. 
15. On the origin of the Rocks of the Trap formation. 
Thomson's Annals of Philosophy. 
16. On Formations; a Paper vindicating the Geological views of 
Werner from an attack made upon them by the Edinburgh Review. 
17. On the supposed Existence of Mechanical Deposits in the 
Primitive Mountains. 
18, On the Igneous Origin of Rocks. 
19. On the Old Red Sandstone. 
20. On contemporaneous Masses and Veins occurring together 
in the same mass of Rocks, 
21. On Beds and Strata—their junctions. 
22. On Stratification—on Veins—on Coal. 
23. On Conglomerated Rocks. » 
24. On the Old Red Sandstone Formation. 
Wernerian Transactions. 
25. On true Veins—contemporaneous Veins—on Granite—on 
Gneiss. 
26. On the Geognosy of the Lothians. 
27. On the Mineralogy of the Pentland Hills. 
28. On Conglomerated or Brecciated Rocks. 
29. On Porphyry. 
30. Mineralogical Observations and Speculations, 
31. On Contemporaneous Veins, 
32. Mineralogical Queries proposed by Professor Jameson, 
33. On Colouring of Geognostical Maps. 
34. On the Topaz of Scotland, 
35. On the Strontian Lead-Glance Formation. 
36. On Cryolite. 
37. Catalogue of Animals of the class Vermes, found in the 
Frith of Forth and other parts of Scotland. 
Edinburgh Philosophical Journal. 
38. Account of Rocks formed by Hot Springs, Torrents of Hot 
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