How remarkable that the month of August this year should rattle Halley's name throughout the globe, in identity with an astonishing scientific triumph, and that in the selfsame month the letters of Flamsteed should have appeared! How I wish some one would give us a life of Newton, with all the interesting documents that exist of his labours! Till such appears, Flamsteed's statements, though bearing strong internal evidence of truth, are _ex-parte_, and it is evident his anxiety made him prone to impute motives which he could not prove. The book is painfully interesting, but except in all that relates to the personal character of Flamsteed, I could almost have wished the documents had been destroyed. People of judgment well know that men without faults are monsters, but vulgar minds delight in seeing the standard of human excellence lowered. Dear Madam, Yours faithfully, W.H. SMYTH. We were deprived of the society of Sir John and Lady Herschel for four years, because Sir John took his telescope and other instruments to the Cape of Good Hope, where he went, accompanied by his family, for the purpose of observing the celestial phenomena of the southern hemisphere. There are more than 6,000 double stars in the northern hemisphere, in a large proportion of which the angle of position and distance between the two stars have been measured, and Sir John determined, in the same manner, 1081 in the southern hemisphere, and I believe many additions have been made to them since that time. In many of these one star revolves rapidly round the other. The elliptical orbits and periodical times of sixteen or seventeen of these stellar systems have been determined. In Gamma Virginis the two stars are nearly of the same magnitude, and were so far apart in the middle of the last century that they were considered to be quite independent of each other. Since then they have been gradually approaching one another, till, in March, 1836, I had a letter from Admiral Smyth, informing me that he had seen one of the stars eclipse the other, from his observatory at Bedford. FROM ADMIRAL SMYTH TO MRS. SOMERVILLE. CRESCENT, BEDFORD, _March 26th, 1836_. MY DEAR MADAM, Knowing the great interest you take in sidereal astronomy, of which so little is yet known, I trust it will not be an intrusion to tell you of a new, extraordinary, and very unexpected fact, in the complete occultation of one "fixed" star by another, under circumstances which admit of no possible doubt or equivocation.