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 Accordingly a meeting of prominent men was called in Boston, with the result that sufficient money was raised to purchase a telescope of the largest size. In August of that very year work was begun on the foundations of the great stone pier on which such a telescope must be supported; and from that day to this, the observatory has not lacked the best of modern equipments. It was an exciting day when the completed telescope was mounted on Observatory Hill. It was the largest refracting telescope in the world save one. That other one was of the same aperture (fifteen inches) and had been ordered at the same time with ours for the observatory at Pulkowa. In these days telescopes of twenty-five inches and over are not uncommon. Our fifteen inch instrument would look like a pigmy by the side of the forty inch Yerkes telescope. Yet even at the present day the Harvard instrument is remarkably fine. Its clearness and defining power are unusual, and for delicate work requiring great accuracy it is unsurpassed. Let us, in imagination, make a visit to the Observatory. We can go past its back door on the electric cars, for this locality, once so retired, has been invaded by the trolley, and only the thick hedge of evergreen trees prevents serious embarrassment from the electric lights. Our pleasanter way will be to leave the car at Garden street and walk up the hill under the grateful shade of magnificent old trees. We have the grounds on our left for some time before we reach the entrance. Inside, we find it like a park. Still walking up hill we approach the Observatory, in front of which is the pleasant home of Professor Pickering, the director. Above and behind towers the great dome. Near
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