Publications of the Empire Marketing Board—{continued). 
E.M.B.28. EMPIRE MARKETING BOARD, May 1929 TO 
May 1930 .. .. . 
E.M.B.29. THE BIOLOGICAL CONTROL OF INSECT AND 
PLANT PEsTS. A Report on the Organ- 
isation and Progress of the Work of 
Farnham House Laboratory. By W. R. 
Thompson, Ph.D., D.Sc. .. ve an 
E.M.B.30. CanADIAN Fruir SHIPMENTS. Report of an 
Investigation by the Economic Section of 
the Empire Marketing Board into the 
Deterioration in Transit of Imported 
Canadian Fruit, 1927-1929 .. bi 
E.M.B.31. THE 
PRODUCTION OF TUNG OIL IN THE EMPIRE 
Memorandum prepared by the Imperial 
Institute .. _ 
E.M.B.32. REPORT ON THE CULTIVATION, TREATMENT AND 
Prospects OF RICE IN BRITISH GUIANA. 
By Charles E. Douglas, M.IMech.E, 
A M.IPet.T., M.I.Struct.E. .. vs 
E.M.B.33. THE 
DISSEMINATION OF RESEARCH RESULTS 
AMONG AGRICULTURAL PRODUCERS. 
Answers to a Questionnaire issued by the 
Empire Marketing Board, with an intro- 
duction by Sir A. Daniel Hall, K.C.B,, 
FR.S.. LL.D. .. 
1s. 0d. (1s. 2d.) 
1s. 0d. (ls. 4d.) 
1s. 0d. (ls. 3d.) 
1s. 0d. (1s. 14. 
Is. 0d. (1s. 2d.) 
1s. 0d. (1s. 4d.) 
All prices are net ; those in parentheses include postage. 
Obtainable from the sale offices of 
HIS MATESTY’S STATIONERY OFFICE 
LONDON : Adastral House, Kingsway, w.C.a. EDINBURGH : 120, George Street. 
MANCHESTER : York Street. CARDIFF : 1, St. Andrew’s Crescent. 
BELFAST : 15, Donegall Square West. 
Or through any Bookseller.