February^ igjj 4, 6, 6 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



Volume XXXIII, Section B, Nos. 4, 5, 6 



HUGH RYAN and W. M. O'EIOEDAN. 



IV. — On the Tinctorial Constituents of some Lichens which are used 



AS Dyes in Ireland. 



HUGH RYAN and PHYLLIS RYAN. ' 



V. — On the Condensation of Aldehydes with Ketones. 



III. — Benzaldehyde with Methyl-Isopropyl-Ketone. 



JOSEPH ALGAE. 



VI. — Unsaturated Ketones derived from Diaceto-Ohcinol. 



DUBLIN 



HODGES, FIGGIS, & CO., Lt0. 



LONDON: WILLIAMS & NORGATE 



I917 



Price Sixpence 



