Walter Hough 
Fire as an Agent in Human Culture [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. In the treatment of this subject the chief consideration is given to the earlier steps in the utilization of fire. The later stages marked by the proliferation of the modern period do not call for more than casual attention.