ABSTRACT
People are many of them familiar with the small wooden or iron building to be seen at various places of amusement labelled the Camera Obscura, and perhaps they have paid the modest sum of two pence to enter and watch the effects produced. The Camera Obscura may be made in two forms, although the essential principle is the same. It is an arrangement of a lens, mirror, and screen, whereby any scenery or view may be reduced to a small scale and thrown on to a screen as a picture, and, if necessary, traced and copied. The one form is a small portable box, in which the picture produced is viewed by one person, and copied if required, and the other is a larger structure which could be erected in a small tent or summerhouse. The chapter describes a small instrument, by means of which natural scenery and buildings can be focused on to a screen and copied.
