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The Hackberry is a medium-sized tree, resembling 

 the Elm; has a medium growth, is clean and symmet- 

 rical. When not crowded its top rounds up well and 

 becomes quite dense. Its spray is the most graceful 

 of our forest trees, and it holds its leaves till late 

 in autumn. It is exceedingly tough. Its limbs never 

 break. It will bear any amount of trampling around, 

 and any amount of drouth, heat, cold, dust and smoke. 

 It bears a dark purple, globular stone fruit, about the 

 size of a pea, with a thin, sweet pulp, ripening late in 

 the fall. It is rarely infested with insects. The leaves 

 of young trees, set out in the city, have sometimes 

 been preyed upon by a little insect late in the summer 

 until they drop off, but they come out again without 

 apparent injury to the trees. This I have never seen 

 happen to old trees or to young ones m the forests. I 

 suppose, if we were to plant Canada thistles for orna- 

 ment or use, something would select them for their 

 victims, and seriously injure, if not destroy them. It 

 grows slowly when small, but when it becomes large 

 enough for transplanting, its growth is fully equal to 

 that of the elm. It requires as much care in trans- 

 planting as other trees, but when it is well started it 

 is there forever. In rich, bottom land it becomes a 

 large tree, but in poor, dry soil it only attains to me- 

 dium size. 



The Catalpa has been to me the most perplexing 

 of all trees. It has been planted here more or less for 

 forty years, with varying success; some of the trees 

 flourishing, others dying, and others again growing 

 scragged, presenting a sickly and unsightly appear- 

 ance. Why this difference? It has been a mystery. 

 But within the last few years the mystery has been 

 solved, chiefly by the observations and labors of Dr. 

 John A. Warder, of North Bend, Ohio; E. E. Barney, of 

 Dayton, Ohio, and Prof C. S. Sargent, of Harvard IFni- 



