the shape of a luxury, and these I have passed rapidly by. Place a book upon a table at an angle of, say, 70 degs., prevent it from falling by propping it up with a lead pencil, and you have a rough illustration of one of the principles of a tripod. Widely speaking, any one leg of a tripod supports… … by dotted line ; now cut the leg down its centre, making two pieces 5 ft. long and f in. thick ; erect these two, making one leg, as shown at fig. 2, adding two small cross-pieces AA, and again place the same weight on the head, and the leg will be, comparatively speaking, firm. From this we see…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial321dodg-715-892.webp)
