If our eyes only saw frames (IE: 30 images a second), like a single lens reflex camera, we'd see images pop in and out of existance and that would really be annoying and not as advantagous to us in our three dimensional space and bodies.
In the Vienna of the second half of the 18th century, in addition to Haydn and Mozart, three symphonic composers, namely Leopold Hoffmann, Carl Ditters von Dittersdorf and J.B. Vanhal helped further the development of the symphony.
Haydn completed the symphony in 1793 or 1794. He wrote it for the second of his two visits to London. Having heard one of his symphonies played in London with an orchestra of 300-strong, his Clock Symphony has that large scale grandeur written in it.