There is also a class of nuisances which, although apparently of a petty nature, may and do inflict much serious injury and annoyance, more especially to invalids. I refer to unnecessary street noises — to dog barking, cock crowing, railway whistling, noise of machinery, &c. I have seen patients dangerously ill suffer severely from these nuisances, the greatest injury being prevention of sleep; yet they, and the authorities, are powerless to suppress or remove them, complaints made to the selfish owners of such nuisances being generally treated with indifference or derision. Although these matters appear trifling, they are always more or less injurious to some, and, in many instances, not only assume dangerous proportions, but produce serious and fatal results. I have therefore not thought them unworthy of passing allusion, and hope they will obtain more definite notice in forthcoming health legislation. Rest is not only essential in disease, but for the preservation of health. How can this be secured in London, if the noises inseparable from day-time are perpetuated throughout the night in still more hideous and injurious forms? The best efforts should be directed to obtain the benefits of nocturnal rest for toiling Londoners, they would then feel less necessity for artificial stimulation during the day, enjoy better health, do more work, and have longer lives.