The plan of the Co-operative Society in sending in a messenger to the various sales of theatre tickets is a very good one. This morning a boy goes in to the sale of tickets at the Boston Theatre for Irving's engagement, which begins next week.
There has been invented a new form of telescope object glass which can be transformed at will from a "photographic" to a "visual" lens by simply turning over the crown-glass lens and changing its distance from the flintglass lens. The Clarks have made for Professor Pickering a lens of this construction with an aperture of thirteen inches and a focal length of fifteen feet.
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ENCOURAGING.
