GENERAL METHODS 153 



better be filled up with a mixture of about equal 

 parts of asphalt and sawdust. Set a similar bri- 

 quette against the wood on the other side of the 

 cavity. Now you can fill in between the two bri- 

 quettes in place. Take a briquette on the awl, dip 

 it, and place it on its longer side on the concrete, 

 its front being flush with the first 

 briquette and with the edge of the W |<J, 

 concrete. Lay another briquette 

 beside the first and continue the 

 course over to the other side of the 

 cavity. Lay on two more courses 

 in the same way. This will bring 

 the flat courses up to a level with 

 the top of the briquette nailed to 

 the wood at the sides of the cavity. 

 Start the next course by laying a briquette with its 

 narrow edge against the wood. Nail this bri- 

 quette to the wood and to the briquette below it. 

 Finish the course. Then, at each side, nail a bri- 

 quette flat against the wood. Build the wall up 

 between them, lay another course from wood to 

 wood, and so on. 



This process is more complicated, naturally, 

 when the side of the cavity is slanting or curved. 

 The principal difference is that the soft asphalt- 

 sawdust mixture is more often called on to fill 

 crevices and corners. The necessary care re- 

 quired for fixing the briquettes at the edges of the 



