es, the group about the "G" line being contains a large portrait of the much-talked-of Dow- especially fine. On orthochromatic plates the ex- ager Empress of China. Prof. Lewes has a popular and posure was doubled, but a negative was obtained that valuable article on Acetylene, giving all the… … of the spectroscope, pushing them illustrated articles on the "Utiliza- SIMPLE APPARATUS FOR PHOTOGRAPHING THE SPECTRUM up to the camera so that all the tion of Unio Shells for Buttons" light was kept out, proved to be and on " The Principles and Prac- to him, and then re entered the coach. The…
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