50 THE CAMEKA, ETC. 



beam between A and D ; a wooden frame fitting 

 accurately in this interval is hinged to A, and forms 

 the basis of the future door. 



The whole is covered with two thicknesses of old 

 newspaper on the outside, care being taken that they 

 are firmly pasted to both floor and ceiling; when dry 

 the part covering the frame-work of the door is cut 

 along the edges and the door opened. 



The inside is now covered in the same way, and 

 when dry the process repeated inside and outside 

 with the thickest tarred paper. A black curtain is 

 hung over the door. The apartment will now be 

 found to be completely light tight. 



The advantage of the paper walls is that a window 

 can be cut in any convenient part, and a couple of 

 sheets of ruby glass a little larger than the orifice 

 fastened over it, by a few strips of orange paper 

 pasted round their edges. 



The best position for the window is four feet from 

 the floor in the longest side, and the same distance 

 from the wall opposite the door. 



Underneath the window a wooden trough lined 

 with lead, about three feet long, eighteen inches 

 wide, and three inches deep, is fixed ; it should have 

 a gradual incline towards a hole in its centre, where 

 the waste pipe is attached, which should pass out- 

 side both apartments if possible. The top should be 

 levelled and a sliding framework, or a board with 

 holes placed upon it, as in (fig. 22). 



If no better water supply can be obtained a barrel 

 capable of holding a sufficient quantity and having a 



