The staff of the Observatory includes a chief astronomer, Mr. Airy, with a salary of L800 a year; and six assistants who are paid, L470, L290, L240, L150, L130, and L130, respectively. This does not include the officers of the Meteorological branch of the establishment, to be spoken of hereafter; and which consists of Mr. Glaisher, with L240 a year, one assistant at L120, and two additional computers. At times, when these scientific laborers have collected more observations than they are able to work out; additional help is summoned, in shape of the body of scientific clerks before spoken of; who, seated at desks, cast up the accounts the planetary bodies, including such regular old friends as the moon and fixed stars, but not forgetting those wandering celestial existences that rush, from time to time, over the meridian, and may be fairly called the chance customers of the astronomer. Though the interior of the Observatory seems so still, the life of those employed there has its excitements. Looking through telescopes forms a small part only of their duty--and that duty can not be done when the weather is unfavorable. On cloudy days the observer is idle; in bright weather he is busy; and a long continuance of clear days and nights gives him more employment than he can well complete. Summer, therefore, is his time of labor; winter his time of rest. It appears that in our climate the nights, on the whole, are clearer than the days, and evenings less cloudy than mornings. Every assistant takes his turn as an observer, and a chain of duty is kept up night and day; at other periods, the busiest portion of the twenty-four hours at the Observatory, is between nine in the morning and two in the afternoon. During this time they work in silence, the task being to complete the records of the observations made, by filling in the requisite columns of figures upon printed forms, and then adding and subtracting them as the case requires. While thus engaged, the assistant who has charge of an instrument looks, from time to time, at his star regulated clock, and when it warns him that his expected planet is nearly due, he leaves his companions, and quietly repairs to the room where the telescope is ready. The adjustment of this has previously been arranged with the greatest nicety. The shutter is moved from the slit in the roof, the astronomer sits upon an easy chair with a movable back. If the object he seeks is high in the heavens, this chair-back is lowered till its occupant almost lies down; if the star is lower, the chair-back is raised in proportion. He has his note-book and metallic pencil in hand. Across the eye-piece of the telescope are stretched seven lines of spider-web, dividing the field of view. If his seat requires change, the least motion arranges it to his satisfaction, for it rests upon a railway of its own. Beside him is one of the star-clocks, and as the moment approaches for the appearance of the planet, the excitement of