Text: and the number of colours increases as one goes nearer to the centre of the ceiling.

Correct capitalization: And the number of colours increases as one goes nearer to the centre of the ceiling.

Text: computer software controls the reel display of modern slot machines.

Correct capitalization: Computer software controls the reel display of modern slot machines.

Text: he also wrote the book a first course in nomography in 1920.

Correct capitalization: He also wrote the book A first course in nomography in 1920.

Text: pictures, photos, facts and information on column of the holiest trinity (prague)

Correct capitalization:
pictures, photos, facts and information on Column of The Holiest Trinity (Prague)