186 ANCIENT PLANTS 



in alcohol painted on with a brush is perhaps the best medium 

 On light- coloured close-textured stones ink is good, and when 

 quite dry can even be washed without blurring. 



The importance of marking the stone itself will be brought 

 home to one on going through an old collection where the paper 

 labels have peeled or rubbed off, or their wording been obli- 

 terated by age or mould. 



A notebook should be kept in which the numbers are entered, 

 with a note of all the items on the paper label, and any addi- 

 tional details of interest. 



APPENDIX III 



LITERATURE 



A short list of a few of the more important papers and books 

 to which a student should refer. The innumerable papers of the 

 specialists will be found cited in these, so that, as they would be 

 read only by advanced students, there is no attempt to catalogue 

 them here. 



Carruthers, W., "On Fossil Cycadean Stems from the Secondary 

 Rocks of Britain," published in the Transactions of the Linnean 

 Society ', vol. xxvi, 1870. 



*Geikie, A., A Text-Book of Geology ', vols. i and ii, London, 1903. 



Grand'Eury, C., "Flore Carbonifere du departement de la Loire et 

 du centre de la France", published in the Memoirs de V Academic 

 des Sciences, Paris, vol. xxiv, 1877. 



*Kidston, R., Catalogue of the Paleozoic Plants in the Department of 

 Geology and Paleontology of the British Museum, London, 1886. 



*Lapworth, C., An Intermediate Text-Book of Geology, twelfth edition, 



London, 1888. 

 Laurent, L., " Les Progres de la paleobotanique angiospermique 



dans la derniere decade ", Progressus Rei Botanicce, vol. i, Heft 2, 



pp. 319-68, Jena, 1907. 



Lindley, J., and Hutton, W., The Fossil Flora of Great Britain, 

 3 vols., published in London, 1831-7. 



Lyell, C., Principles of Geology and The Studenfs Lyell, edited by 

 J. W. Judd, London, 1896. 



