* I* 
Vol. iv.] 
JUNE, 1883. 
[Part 
Edited by 
.E. F. IM Thurn, M.A 
Contents. 
Papers.— The First Ascent of Roraima, by the Editor ; 
Further Remarks on the Roots of the Sugar Cane, by H. Ling 
Roth ; The Diffusion Process as applied to the Sugar Cane, by 
C. A. Matthey ; Note on the Dilution of the Juice in the Sugar 
Cane } by Maurice I. Coster, M.E. ; The Etymology of the Word 
Rum, by N. Darnell Davis; The Architeclure of Georgetown, by 
the Very Revd. Ignatius Scoles, S.J. ; Alexander Winter-. In Me- 
moriam, by the Editor ; On the proportion of Sugar in Sugar- 
Cane } by E. E. H. Francis, (printed in the Society's Report). 
OCCASIONAL NOTES. — Cattleya Lawrenceana, n. sp. ; A New 
Guiana A roid ; The Manner of growth of Blechnum (Salpichloena) 
volubile, Klf ; Scraps of Colonial History ; A Difficulty of 
Botanical Colleclors. 
Report of Society's Meetings, from January to June, 1885. 
Publishers : 
Demerara : J. THOMSON, Argosy Printing Press. 
London : E. STANFORD, Charing Cross, S.W. 
