06 



destroyed with the cloth. The result of his experiment showed 

 that the Protector thus used was quite successful, although the 

 Committee thought the trees were damaged about as much as 

 the average of trees protected by other methods. Perhaps 

 Ordw'ay's Protector is as effectual a preventive as anything 

 which does not cause the death of the grub before laying her 

 eggs. Mr. Sawyer states that, by tarring the trees above the 

 Protectors, he became satisfied that the grubs could not pass 

 over it, but he also states that be caught grubs and young worms 

 ascending the tree at the same time. He also found large 

 numbers of young worms hatched upon the stone walls by the 

 side of the trees, from which it is fair to presume that they 

 would travel to the tree. 



If it is a fact that the grubs lay their eggs upon the stone 

 walls and stubble and continue to run until after the young 

 worms begin to hatch, it seems to be clearly demonstrated that 

 no protector can effectually save the tree unless it causes the 

 death of the grub or prevents the ascent of the newly hatched 

 worms. The expense and the fact that a new cloth for both 

 tree and Protector must be annually supplied, constitute the 

 principal additional objections to a general use of Ordway's 

 Protector. 



There was also brought to the notice of the Committee, by 

 Mr. John Bradstrect of Wenham, a zinc protector, consisting 

 of a trough surrounding the tree and designed to be filled with 

 kerosene oil. This costs twelve cents per inch (in diameter), 

 and was patented in 1865. We were unable to pronounce 

 upon the effectiveness of this protector ; tlie only objection 

 raised was that of expense. Another contrivance brought to 

 the notice of the Committee has been patented, we understand, 

 by Mr. Mears, of Essex. This consists of a trough or gutter 

 of coarse cloth or bagging. A hoop is sewn into a cloth, the 

 upper end of which is tied tightly around the tree, and by 

 raising the hoop a gutter is formed, which is to be filled with tar. 



The tar wcei)s slowly through the cloth, constantly present- 

 ing a surface of fresh tar underneath, over which the grub can 

 not })ass. And if the grub is able to pass over the underside, 



