asked the Minister of Agriculture whether injury is being caused to vegetation in the Royal Botanic Gardens, Kew, by the emission of black smoke from factory shafts in Brentford; and, if so, whether he will take legal steps to abate the nuisance similar to those successfully taken by the First Commissioner of Works in 1902, when Brentford smoke was shown to be causing serious injury to plant-life in the Royal Botanic Gardens?