350 



Mr. T. Pridgin Teale 



[Feb. 5, 



should be reduced in ividtli by triangular firebricks at each side, which 

 reduce the fire space to a square, with the addition of the IJ-inch 

 space under the back. This rule secures sufficient depth from front 

 to back, and a constant proportion between depth and width, whatever 

 be the size of grate. 



Rule VIII. " The slits in the grating, or grid, should he narrow, 

 perhaps ^ inch for a sitting-room grate and good coal, f for a kitchen 

 grate and had coal." — When the slits are larger, small cinders fall 

 through and are wasted. 



Rule IX. " The front hars should he vertical, that ashes may not 

 lodge and look untidy ; narrow, perhaps ^-inch in thickness, so as not to 

 ohstruct heat ; and close together, perhaps ^-inch apart, so as to prevent 

 coal and cinder from falling on the hearth" (Fig. 3). — It is too soon to 



Fig. 2. 



INCHfS 



judge as to the lasting powers of \-m. bars. Those in one of my 

 own grates are round, and after 4J months' daily wear, show no sign 

 of burning away. 



Flat bars, J in. X J in,, or even by |- in., might perhaps resist fire 

 better, if the ^-in. round bars burn away. The bars are so arranged 

 that if one fails, it can easily ,be renewed. I have round bars about 

 -^- in. in diameter at present on trial in my kitchen range. 



Rule X. " There should he a rim 1 inch or IJ inch in depth 

 round the lower insertion of the vertical hars" (Fig. 8). — The object of 

 this is to conceal the ash at the bottom of the fire, and to enable 

 the front cinders to burn away completely by protecting them from 

 the cold air. This rim (F) contributes greatly to tidiness, and as a 

 rule will prevent the need of any sweeping up of the hearth during 

 the day. 



