The First Edition of 2,000 copies was applied for in less than 

 six months, not only by residents of every Australian Colony and 

 New Zealand, but by correspondents in many parts of the world, 

 especially European tanners and American extract makers. 



The present edition is practically a new work, and will be found 

 to contain a mass of information in regard to the utilization of 

 wattles which has never before been got together. This result 

 has only been possible on account of the abundance of material 

 I have obtained and worked at during the past season, and the 

 generous co-operation of persons engaged in various branches 

 of the industry. 



I desire to express my obligations to Mr. R. T. Baker, Assistant 

 Curator, and to Mr. H. G. Smith, Laboratory Assistant, for valuable 

 help. 



J. H. M. 



Technological Museum, 



Sydney ', April, 1891. 



