Before revision: First the Vegetable Drugs Committee (VDC) of the Ministry of Supply was established at the Royal Botanic Gardens, Kew , including two Kew experts, DrMetcalfe and Dr Ronald Melville, botanist and pharmacist.
After revision: First the Vegetable Drugs Committee (VDC) of the Ministry of Supply was established in March, 1941, and the invovlement of the Royal Botanic Gardens, Kew was led by Dr.an economic Ronald Melville, botanist and pharmacist.