THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Vol. XV. (U.S.), ffo. 35. FEBRUARY, 1919. 



A DISEASE OF TOMATO AND OTHER PLANTS 

 CAUSED BY A NEW SPECIES OF PHYTOPH- 

 THORA. .^aSIsot' 2 ' 



" \ 

 JUN 15 1920 ) 



BY 



GEORGE H. PETHYBRIDGE, B.Sc, Ph.D., 



ECONOMIC BOTANIST TO THE DEPARTMENT OF AGKICULTCEE AND TECHNICAL 

 INSTRUCTION FOR IRELAND J 



AND 



H. A. LAFFERTY, A.R.C.Sc.L, 



ASSISTANT IN THE SEEDS AND PLANT DISEASE DIVISION OF THE DEPARTMENT. 



(PLATES XLV.-XLVII.) 

 [^ uthors alone are responsible for all opinions expressed in their Communications- 1 



DUBLIN : 



PUBLISHED BY THE ROYAL DUBLIN SOCIETY, 



LEINSTER HODSE, DUBLIN. 



WILLIAMS AND NORGATE, 



14, HENRIETTA STREET, COVENT GARDEN, LONDON, W.C. 



1919. 



Price One Shilling and Sixpence. 



