182 



The Ventilation of Coal Mines. 



[April, 



A close examination of these returns gives the following mean 

 annual average of miners killed, by each class of accident, in each 

 inspector's district. 



1. Northumberland, North Dur-j 



ham. and Cumberland J 



2. South Durham 



3. Lancashire X. and E. Division . 



4. Lancashire W. and North Wales 



5. Yorkshire 



6. Derbyshire, Nottinghamshire, 



Leicestershire, Warwickshire 



7. North Stafford and Cheshire 



8. S. Stafford and Worcestershire 

 Monmouthshire, Gloucester- 

 shire, Somerset, and Devon 



South Wales 



Scotland E. 



Scotland W 



Ironstone Mines in connection 

 vrith coal-fields 



Total 



Explo- 

 sions. 



Falls of Accidents 

 Roof, in Shafts 



_ , I Total in 

 Sundry h ^ 



Causes - i trict. 



30-1 



33-0 



12-1 



59-3 



135-5 



6-2 

 11-3 



19-0 

 21-2 



34-0 

 27-1 

 34 3 

 25-0 



9-4 

 12-2 

 19- 1 

 13-0 



20-2 

 10-3 



11-2 

 7-2 



69-8 

 60-9 

 83-6 

 66-4 



2-4 



22-1 



104 



14-1 



49-0 



9 

 11-4 



200 

 75-3 



22-0 

 31-3 



8-1 

 101 



59-1 

 128-1 



31-4 



35-0 



8-0 



7-3 



81-7 



33-1 

 2-2 



6-2 



551 



23-4 

 22-3 



11 



9-3 

 8-2 



25-1 

 5-0 



3-2 



124-3 

 39-9 

 399 



163-5 



406-6 



167-0 



181-1 



918-2 



6-1 



40-0 



30-0 



15-0 



; 9i-i 



169-6 446-6 197-0 



196-1 1009-3 



1. The number of accidents involving loss of life in each year . 851 



2. Tiie number of lives lost in each year by the above accidents 1009 ■ 3 



3. Th.3 number of collieries in the United Kingdom .... 3,256 



4. Accidents therefore occur annually at rather less than one- 



third of the colli rries. 



5. A life is lost annuallv at one-third of the collieries. 



6. Quantity of coal raised annually 98,000.000 tons. 



7. Therefore a life is lost for, of coal raised . . . . 97,135 .. 



8. Value of the coal raised at pits mouth .... £24,500.000 



9. A life is lost in the production of coal valued at . £24.390 



"We leam also from this examination, that explosions of fire- 

 damp are not the most frequent causes of death. There are killed 

 in each year : — 



Bv explosions of fire-damp 169-6 



Falls of roof 446 -6 



Accidents in shafts ....... 197*0 



Sundry causes 196-1 



1009-3 



Of course, the loss of nearly 400 lives in the two terrible explo- 

 sions of last year will greatly elevate the average for some years 

 to come. But the Bamsley explosion must, in its disastrous results, 

 be regarded as an exceptional case, as we shall endeavour to show. 



With great industry Mr. Wm. Green, jun., has collected 



