290 



On the Construction of Kitchen 



of its four corners with a single pin ; and filled up in 

 the middle with a square board or panel, which is con- 

 fined in its place, by being made to enter into deep 

 grooves or channels, made to receive it, in the insides 

 of the pieces which form the frame. The circular iron 

 door to which this panel is fixed cannot be seen in the 

 figure, being covered and concealed from view by the 



Fig. 1 8. 



wood, but its size and position are marked out by a 

 dotted circle ; and the heads of ten rivets are seen, by 

 which the wooden panel is fastened to the iron door. 

 These rivets are made to hold the wood fast to the iron 

 by means of small circular plates of sheet iron, which 

 are distinctly represented in the figure.* 



If the positions of the pins by which the wooden 

 frame is fastened together, and of the rivets which 

 fasten the panel to the iron door, are considered, it 

 will be evident that all bad effects of the shrinking of 

 the wood by the heat are prevented by the proposed 



* Instead of these rivets, short wood screws may be used for fastening the 

 wooden panel to the iron door ; but care must be taken to place these screws 

 in the same places which are pointed out for the rivets. The heads of the wood 

 screws must of course be on the inside of the iron door. 



