THE EXPOSITOR, London, Dec. 7, 1850  It is subtitled: "A Weekly Illustrated Recorder of Inventions, Designs, and Art-Manufactures" causing the format to be very similar to America's 'Scientific American'. However, the timing, and the print in the masthead, indicate it coincided with the Great Exhibition held in London's Hyde Park May thru October, 1851. This is issue #6.
The front page has a large print: "View of the Transept, with Preparations for Housing the Great Central Ribs". Inside pages focus on inventions and improvements of the day.
Sixteen pages, 8 1/2 by 13 inches, great condition.