PLATE XXXIV. 



Fig. 1. 



Stiff-mud machine for molding conduits. Globe Fireproofing Company, Clay- 

 ville. Conduit, after molding, is placed on the stand at the left to have 

 its edges trimmed smooth. 



Fig. 2. 



General view of hollow-brick works of John Braislin & Son, Crosswicks. 



