Mr. Bond was engaged to make at his private observatory in Dorchester, Mass., investigations to fix a zero of longitude, whence final reference to Greenwich might be had, and to make a continuous record of magnetic observations at Dorchester for comparison with like records obtained at distant points by the expedition itself. As preliminary to the latter work, Mr. Bond tested in an isolated observatory in Dorchester the magnetic instruments with which the expedition was to be equipped. Mr. Bond’s talents were as well known at Cambridge as at Washington. What Mr. Quincy did in the premises can best be stated in his own words: “Early in the year 1839, the exploring expedition then being in the Southern ocean, it occurred to the president of the university that if Mr. Bond could be induced to transfer his residence and apparatus to Cambridge and pursue his observations there, under the auspices of the university, it would have an important influence in clearing the way for an establishment of an efficient observatory in connection with that seminary, by the increase of the apparatus at its command, by the interest which the observations making by Mr. Bond were calculated to excite, and, by drawing the attention of the citizens of Boston and its vicinity to the great inadequacy of the means possessed by the university for efficient astronomical observations, create a desire and a disposition to supply them.” This proposition, Mr. Quincy says in another connection, he made without having consulted with the corporation. That body sanctioned his action by making a formal contract with Mr. Bond, of date Nov. 30, 1839, the agreement on Mr. Bond’s part being to make the transfer as proposed. Steps were at once taken by the college authorities to secure a subscription of $100 each from 30 different gentlemen, which sum was applied, under Mr. Bond’s direction, in alterations and additions to a dwelling house owned by the college and known as the “Dana house.” It still stands upon its original site at the junction of Quincy and Harvard streets, the lot being the southeast corner of what are distinctively called “the college grounds.” The cupola which crowns the roof is a reminder and proof of a part of these alterations: for within it was set up one of the telescopes of the first college observatory, the cupola when constructed being suitably domed for the purpose. Something practical in astronomy had always been taught in the college course. In this way, or possibly by Mr. Bond himself, the position of Harvard Hall on the college grounds had been determined. Thus, in a paper published by him in 1833 in the Memoirs of the American Academy, he gives the position of his observatory in Dorchester as “0°-3′-15″ east of Harvard Hall in Cambridge.”