The author commences this report by observing, that the result of the observations upon the tides in the English Channel, made in the course of the summer of 1848, had confirmed in a satisfactory manner the view he had taken of the tidal phenomena of the channel, in the report communicated to the Royal Society last year, and printed in the Philosophical Transactions (Part I. 1848), namely, that there is a meeting and a separation of the streams between Alderney and the Start: that the whole space between the Start and Scilly is under the joint influence of the channel and offing streams: that from the vicinity of the Start to the vicinity of Hastings the stream runs true up and down the channel; and moreover that this stream throughout turns nearly simultaneously with the time of high and low water on the shore at the virtual head of the tide, which he places in the vicinity of Dover; and lastly, that the streams which meet off the Start are turned down into the Gulf of St. Malo, and vice versâ . He then takes a comprehensive view of the tidal system of the English Channel and German Ocean together, and considering them as one great canal open at both extremities to the free admission of a great tidal wave, which might be supposed to meet and form a combined or stationary wave (art. 187, Encyclopedia Metropolitana), he infers that in such a case, there ought to be in the eastern half of such a canal, a recurrence of the phenomena which had been found to exist in the western half . He proceeds to explain that, from a valuable series of observations in the German Ocean by Captain Washington, R. N., and other authorities, it does appear that, inverting the direction of the stream, there is a correspondence of phenomena in almost every respect: that the offing and channel streams meet off Lynn, as off the Gulf of St. Malo, at the same hours, and at the same distance nearly from the virtual head of the tide: that the phase of the tide at Lynn corresponds with the phase of the tide at Jersey: that there is an increased rise there also; and that from the meeting of the tides off Lynn to the meeting of the streams off Dover, there is, as in the former case, a stream which turns nearly simultaneously with the high and low water on the shore at Dover; the incoming and outgoing streams coinciding with the rising and falling water there; and that there is, in fact, a complete identity of tidal phenomena in both parts of the supposed canal; of this an illustration is given in two plans.