H—34

1949 NEW ZEALAND

DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH (TWENTY-THIRD ANNUAL REPORT OF THE)

Presented to Both Houses of the General Assembly by Leave

CONTENTS

PAGE Minister's Statement .. .. 3 Secretary's Report .. .. 6 Reports From Branches—■ Agronomy Division .. .. .. 9 Animal Ecology Section .. 12 Auckland Industrial Development Laboratories .. .. .. 12 Biometrics Section .. .. 14 Botany Division .. .. 15 Dominion Laboratory .. .. 17 Dominion Physical Laboratory .. 22 Entomology Division .. .. 30 Eats Research Laboratory .. 32 Fruit Research Station .. 33 Geological Survey .. .. 34 Geophysical Observatory, Christchurch . . 37 Geophysical Observatory, Wellington .. 39 Grasslands Division .. .. 40 Information Bureau .. .. 44 Magnetic Survey .. .. 45 Occupational Psychology Research Unit .. 46 Plant Chemistry Laboratory .. .. 47 Plant Diseases Division .. 49 Seismological Observatory .. 53 Soil Bureau .. .. .. 54 Reports op Research Committees op the Council op Scientific and Industrial Research— Building Research .. .. 56 Hop Research .. .. 58 Manufacturers' Research Committee . . 59 N.Z. Radio Research Committee . . 60 Tobacco Research .. .. 60 Wheat Research Institute . . 65

PAGE Reports of Incorporated Research Associations— Dairy Research Institute (N.Z.) .. 67 N.Z. Fertilizer Manufacturers' Research Association (Inc.) .. .. .. 68 N.Z. Leather and Shoe Research Association (Inc.) .. .. 69 N.Z. Pottery and Ceramic Research Association (Inc.) .. .. 69 N.Z. Woollen-mills' Research Association (Inc.) .. .. .. .. 70 Research Institute of Launderers, DryCleaners, and Dyers of New Zealand (Inc.) .. .. .. .. 70 Cawthron Institute— Entomology Investigations .. .. 71 Fruit Research .. .. .. 72 Plant Nutrition Investigations .. .. 74 Soil Investigations .. .. .. 75 Tomato Research .. .. 76 University Colleges— Canterbury Agricultural College .. 79 Canterbury College Industrial Development Department .. .. 83 Massey Agricultural .College .. 83 Seventh Pacific Science Congress .. 86 Scientific Liaison Service .. .. 86 Scientific Personnel Section .. .. 87 Commonwealth Agricultural Bureaux .. 88