332 



THE WHEAT CULTUKIST. 



the third grinding. Where a graver was pressed into 

 the section at the centre, and carried toward the edge 

 with a uniform pressure, the groove formed grew grad- 



REYNOLDS. BARBER &LCo.SdeManufactnr^rs kUBURH N.Y. 

 Fig. 53. 



nally shallower, until it touched tlie line of demarca- 

 tion — in the Messrs. Reynolds' sections — showing that 

 the hardening was progressive from the centre to the 

 line of demarkation. In the sections made bv other 

 firms the groove formed by the graver was of uniform 

 depth until it touched the line of demarcation, when it 

 became at one very shallow. This test shows that the 

 sections of the Messrs. Reynolds grew gradually harder 

 from the centre to the line of demarcation, and that the 

 quality of the metal on either side of the line is not so 

 dissimilar as to cause fractures ; and accounted very fully 

 for their absence in the sections. 



"Having thus ascertained the superiority of these 

 sections, we were desirous of seeing the processes of their 



