Tidal Waves

Tbough the greatest and most reinarkable phenornenon pertainiug to the eurface of the sea is the tidal wave, scientific authorities acknowledge that it still presenta some unexplainable anomalies. It is demonstrated, however, that the moveraent is made up of many waves dependent upon different functions of the moon and sun, some being semidiurnal, some diurnal. The time of transit over the meridian and the declination of both bodies créate great variations. The changing distance and position of the moon and the position of her node also have immense effect, while the ever varying direction and force of the winds and the different pressure of the atmosphere play theii part. An interesting fact in thia relation is that observations all over the world show no place where the tidal movement is so regular and simple as around the British islands - a fact more remarkable wben it is known that the tides on the other side of the Atlantic, as, for instance, at Nova Scotia, are very complicated, the unexplainable case here being that the minor tides, which in most parts of the world, when combined in one directiou, amonnt to a very considerable fraction of the principal lunar and solar tides, and consequently greatly increase or diminish their effects, are in Great Britain so ineignificant that their influence is fliug. -