10 PREFACE 



The fact that this wood-clamp silo form is rigid and 

 amply strong for the work of a construction that 

 requires the minimum of lumber, and is easily raised 

 in a manner that makes it almost impossible to get 

 the walls from a perfect vertical line, should be of 

 vast interest to every contractor or silo builder. 



The molding of monolithic silo walls, with a 

 continuous air-chamber between same, is also fully 

 treated; one by employing a simple and easily con- 

 structed automatic wall-clamp, and also by the well- 

 known method of building the walls from blocks or 

 units. 



The construction of silos from concrete plaster or 

 stucco is also explained, as well as the reinforcement 

 of silos, with tables for the proper placing of this 

 reinforcing material. The different types of silo 

 doors, and two methods of making a concrete roof 

 plain and ornamental for the silo, are explained in 

 detail. 



Believing that this volume will fill every need of 

 the contractor for practical and easily understood 

 instruction upon this subject, and that it will be of 

 value to you, I am, 



Very truly yours, 



A. A. HOUGHTON. 

 February, 1911, 



