THE BRITISH NATURE BOOK 



The next step is to make a base-board and front Fig. 12. The front (ABCD) 

 is a plain piece of wood, of the same dimensions as the back of the body, allowing 

 for an extra edge by which to join it to the base-board. In the centre is a hole 

 i inch in diameter. This is attached, at right angles, to another piece of 

 wood, an inch longer than the camera body, and the same width. On the 

 outer sides (DE and CF) are fixed two slips of wood, to act as runners. If you 

 are clever enough to be able to groove these, so much the better, as then you 



FIG. ii. 



FIG. 12. Base-board and front. 



will be able to affix corresponding runners to the under side of your camera 

 body, so that it slides to and fro along the base-board. But if you cannot 

 manage the neat grooving, leave the slips of wood plain, and instead cut a 

 narrow slot, 3^ inches long, in the centre of the base-board at GH. Attach 

 the front and base-board together, and strengthen them by two strips of wood 

 or brass, as shown in the diagram at C and D. 



Now turn again to the camera body. You have to attach to the under side 

 of it a piece of wood, of the shape shown in Fig. 13. This must be of a width 



FIG. 13. 



FIG. 14. The camera complete. 



to fit neatly between the slips of wood on the base-board ; its length must 

 be the same as that of the camera body. A rectangular strip is cut out of the 

 centre (GH), and the portion of the cramp which contains the screw is to be 

 fixed there. Note that the cup of the cramp is screwed to the wood at G ; 

 the rest is left loose for the moment. 



This odd-shaped piece of wood is screwed to the bottom of the camera 

 body, so that the unattached end of the screw juts out below the dark slide 

 (see A in Fig. 14). And you now attach the loose plate (CD in Fig. 90} to the 



