The library should not pass unnoticed. It is small; but being devoted to works upon astronomy, and the kindred sciences, there is ample room for all that has hitherto been written on the subject, or that can, for many generations, be produced. The observations of a lifetime spent in watching the stars may be printed in marvellously few pages. A glance through the Greenwich Astronomical Library gives a rough general idea of what the world has done and is doing for the promotion of this science. Russia contributes large, imperial-looking tomes, that tell of extended observations made under the munificent patronage of a despot; Germany sends from different points a variety of smaller, cheaper-looking, yet valuable contributions; France gives proofs of her genius and her discoveries; but _her_ forte is not in observation. The French are bad observers. They have no such proofs of unremitting, patient toil in search of facts, as those afforded in the records of the Greenwich Tables of the Moon. Indeed, Greenwich, as we have already said, is a working Observatory; and those who go into its library, and its fire-proof manuscript-room, and see how its volumes of observations have been growing from the small beginnings of the days of Flamstead and Halley, to those of our later and more liberal times, will have good reason to acknowledge that the money devoted to this establishment has been well employed. One other spot must be noticed as amongst the notable things in this astronomical sanctum. It is the Chronometer-room, to which, during the first three Mondays in the year, the chief watchmakers of London send in their choicest instruments for examination and trial. The watches remain for a good portion of a year; their rates being noted, day by day, by two persons; and then the makers of the best receive prizes, and their instruments are purchased for the navy. Other competitors obtain certificates of excellence, which bring customers from the merchant service; whilst others pass unrewarded. To enter the room where these admirable instruments are kept, suggests the idea of going into a Brobdingnag Watch-factory. Round the place are ranged shelves, on which the large watches are placed, all ticking in the most distinct and formidable way one against another. When they first arrive, in January, they are left to the ordinary atmospheric temperature for some months. Their rates being taken under these circumstances, a large stove in the centre of the apartment is lighted, and heat got up to a sort of artificial East India or Gold Coast point. Tried under these influences, they are placed in an iron tray over the stove, like so many watch-pies in a baker’s dish, and the fire being encouraged, they are literally kept baking, to see how their metal will stand that style of treatment. Whilst thus hot, their rates are once more taken; and then, after this fiery ordeal, such of them as their owners like to trust to an opposite