124 



ECCDNOMY OF FUEL. 



A hole IS made in the brick work in the middle, a 

 little above the opening of the fire place forming a fmall 

 flue to let in the external air by which the fmokc is 

 driven back into the chimney. This has been found 

 to have an admirable effe£t even in fome chimnies which 

 before had fmoked fo as to be deemed incurable. 



DIRECTIONS TO thi BINDER. 



Plate 



NO. 



N. B. In the plates referred to, as 



j.„. V. VI. VII. VIII. IX. X. XL XII. 



I. 2. 3. 4. 5. 6. 7. 8. are marked on the plates. 



THE END. 



ERRATA. 



Page 199 line 28 — after Irancb read or mouth. 



201 — 18 & 20 — before S read c. as in lines 17 and 19. 



208 6 — for extremes read extreme differences. 



7 — after ohfervalions read 'when 'worked feparately. 



266 I — after limb TC:idfrom. 



287 29 — dSiQX Cumberland rti^id JJIand. 



