Star-land : being talks with young people about the wonders of the heavens (1891)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · London ; Paris : Cassell & Co. · leaf 105
the next figure you will see a sectionthrough the building, and the wheels are exposed by whichthe dome is carried. These wheels run easily on rails, sothat when the attendant pulls the rope which you see inhis hands, he turns round a large pulley, and that turns alittle cog-wheel which works into… … piffi 35.—The Dome at Dunsink Observatory. can easily set the whole in motion. The object of all thismachinery is seen when we learn that there is only one The Moon. 9i opening in the dome. It is covered by the shutter shownover the doorway in Fig. 35. When opened to the top, itgives a long and…
Astronomy
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