^H9 Lamp for Tailow, and Combuftion of that Material, 



?■ The cup C, in Plate XVI. is made without the tube g in the infide, and the thumb fcrew 

 is fixed near ib bottom. 



Another cup, about three quarters of an inch deep, is made to Aide eafily into the cup C ; 

 the brim of it is furrounded by a ring which proje£l:s outwardly, and to the bottom is 

 foldercd the tubey. 



The cup B is {bldered to tJie tube^ as before, and when detached from the reft of the 

 apparatus, is accompanied by the additional cup, which ferves it for a bottom or ftand, and 

 for the receptacle of the fuperfluous tallow. 



Laftly, when B is put into its proper place, the ring which furrounds the interior cup 

 rells upon the brim of the cup C, and prevents the bottom from touching the tallow which 

 drops into C when B is removed. 



Seftion of the cups B, C, Fig. i, Plate XXIII. and the interior cup, intended only to Jiljif- 

 trate the defcription. I haVe not yet feen your laft Number : I have bought rendered hogs' 

 lard at 6d. a pound lately at this place. It is now •about 7 d.. Sheep's fuet at 7d. Tallow 

 fold laft year at about 7s. 6d. a ftone. Train oil is about 5d. a pint. 



Farmers and country people confume a great quantity of impure tallow in ru/b candles. 

 Tallow is alfo burnt in a common cylindrical drinking glafs, in fome places the wick is fup- 

 ported upon a piece of fplit ftick, the lower end of which is thruft into fome foft fubftance 

 put into the bottom of the glafs ; a quantity of water Is then poured in, and the remainder 

 filled with melted tallow. ' 



This is but an inconvenient method of burning tallow : the light is much dimmed by 

 the fides of the glafs covered -with oil ; it requires fnuffing, which is not eafy to efFeftj and 

 the light is very unfteady from currents of air pafling over the top of the glafs. 



END OF THE THIRD VOLUME. 



