//Constructor
        public WeatherObserver(ListBox lb, WeatherSubject subject)
        {
            // Inititalise variables
            currentTemp     = 0;
            currentHumidity = 0;
            currentPressure = 0;

            this.lb      = lb;
            this.subject = subject;

            // Adds Observer to the Observer list
            subject.AddObservers(this);
        }