eport, the exit of the user, the lid is shut invariably. A board rial required.—Paper Trade Journal. being for the year 1875. This book, of 475 pages, exhibits apron, A, below the seat closes the vault,compelling the gases annual reports from the United States Signal Stations in to pass out by the… … perforated and valved Toning of Photo Transparencies on Glass. This operation is scarcely necessary if the transparency piston, I. When this balanced valve or flap, passes through the apron, tightly fit- should have been reinforced with acid silver, and is only re- piston is drawn back, ted by…
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