442 Mr. W. Galloway. [Mar. 23, 



Fig. 2. 



black lines drawn across the white ground. As the coal-dust flames 

 issued from the apparatus they assumed various forms according to 

 the direction in which the wind happened to drift the cloud of coal- 

 dust and air which preceded them. Nos. 39 and 58 were bent back- 

 wards, as the wind was blowing against the open end of the gallery 

 at the time ; Nos. 43 and 59, on the contrary, were drawn out in the 

 same line as the gallery, the wind favouring that development ; the 

 others are more or less doubtful. 



Fig. 3 is a side view and two sections of the gallery on a larger 

 scale than the last. The bands of iron which hold the wood-work 



Fig. 3. 



