Counties. 2 " 



B L A 



5" Names of ihe Furnaces. 



B L A 





E S 



Couiuies, 



Carmarthen 

 Chefliire 



Denbigh 



Derby 



Gloucefter 



Hereford 



Hampfhire 

 Kent 



Brought forward 4 

 I Kidwelly - - i 



? § „ i i c ? 



1000 



100 Stafford 



Monmouth 



Nottingham 

 Salop 



I Valercydle 

 1 Lawtone 

 I Dodingtoi] 



3 furnaces. 



I Waddoch 



1 Ruabone 



2 furnaces. 



1 Stavely 



I Foxbrooke 



I Wingworth 



I Wanely 



4 furnaces. 



1 6co 



I 600 

 I 500 



Blabney 



Elmbiidge 



Flaxky 



Redbrooke 



Ditto 



Sidney 



6 furnaces. 



I St, Waynarde 

 I Bingwood 

 I BJfhopwood 



3 furnaces. 



I New Forefl Firne 



I Lamard 

 I Barcliiie 

 I Horfden 

 I Handberft 



4 furnaces. 



I Pontypool 



1 Ditto 



2 furnaces. 

 1 Kirkby 



- I 



- I 



- I 



- I 



- I 



Salop 



Bo widen 



Willy 



Ditto 



Leighton 



Kimbrottcn 



6 furnaces. 



1700 



300 

 250 



150 

 150 



200 

 300 



600 

 500 

 700 

 600 

 200 

 250 



55^ 



800 



2850 



I 300 

 I 450 

 I 60Q 



200 



100 



lOQ 

 1 00 

 100. 



400 

 500 



400 

 400 

 450 

 200 

 400 

 250 



400 



9QO 

 200 



Carried forward 37 



""5 2- Names of the Fuiniices. -^^ -"-S =Ss 



Brought forward 37 12150 



I Bradlv - - I 400 



I Winciieath . . I 600 



lOOQ 



JCKJ 



2100 



12150 



1400 



700- 



i400> 

 17350 



Tons. cwt. qr. 



Annual average for each furnace 294 i i 



By this ftatement it is evident, that the manufafture of 

 pig-iron had diminifhcd during one hundred to one hundred 

 and thirty years preceding, upwards of 50,000 tons annually. 

 Fortunately for the exi Hence of the trade, the application 

 of good going, and what, at that time, would be reckoned 

 powerful, fteam engines, about the year 1750,. for raifmg 

 and compreffing air, were introduced at fome places where 

 abundance of materials was found without water for turn- 

 ing machinery. The manufacturer now found that his 

 produce could be increafed by enlarging the diameter of his 

 ileam cylinder,or perfcfting the vacuum under the pifton j and 

 it was foondifcovered,. that thtfe increafed effedls alone were 

 requifite to the formation of pig iron, in profitable quantity 

 from the coke of pit coal ; nor is it to be wondered that this 

 fecret remained fo long a myllery. The fmall quantity of 

 air that was formerly requifite to ignite a charcoal furnace, 

 whether from the great inflammability of the fuel, or the 

 fmallnefs of its capacity, was conllantly before the eyes of 

 the manufafturer. He had more often felt the cfTcfts of 

 over-blowing, than under-blowing his furnace ; and it is 

 highly probable, that pit coal, being deemed every way 



inferior, 



