APPENDIX. 381 



On the Action of Dry Gases on Organic Colouring Matters, 



and its Relation to the Theory of Bleaching. Trans. R.S.E. 

 On the Argument for the Binary Theory of Salts from the 



Non-action of Anhydrous OxygenAcids on organic Colours. 



Memoirs of Chemical Society, London. 



1849. 

 On the Early History of the Air-Pump in England. Read to 



R.S.E.: published in Edin. Phil. Journal. 

 On the Extraction of Mannite from the Root of Dandelion. 



Trans. R.S.E. 



1850. 

 On the Crystallization of Carbon and the Possible Derivation 



of the Diamond from Graphite and Anthracite. Read to 



R.S.E.: published in Edin. Phil. Journal 

 On the Presence of Fluorine in Differe'nt Ocean Waters. 



Read to R.S.E. : published in Edin. Phil. Journal. 

 On the Presence of Fluorine in Blood and Milk. Read to 



British Association : published in Edin. Phil. Journal. 



1852. 

 On the Organs in which Lead accumulates in the Horse in 



Cases of Slow Poisoning by that Metal. Read to R.S.E.: 



published in Edin. Monthly Medical Journal. 

 On Two New Processes for the Detection of Fluorine when 



accompanied by Silica ; and on the Presence of Fluorine 



in Granite, Trap, and other Igneous Rocks, and in the 



Ashes of Recent and Fossil Plants. Trans. R.S.E. 

 On a supposed Meteoric Stone, alleged to have fallen in 



Hampshire in September, 1852. Trans. R.S.E. 



1853- 

 On Nitric Acid as a Source of the" Nitrogen found in Plants. 



Trans. R.S.E. 



1855. 

 On Colour-Blindness in Relation to the Danger attending 



the Present System of Railway and Marine Coloured 



Signals. Trans. R.S.S.A. Reprinted as Supplement to 



Researches on Colour-Blindness. 

 On the Extent to which the received Theory of Vision 



requires us to regard the Eye as a Camera Obscura. 



Trans. R.S.E. 



