504 OBJECTIONS TO WELDING. [BOOK III. 



The construction of the professors shoe will be 

 seen in figures 4, 5, 6. 



Fiff.4 Fia.5 Fi ff'S 



11 The bar of iron down the middle of the shoe, 

 called the frog-bar, is made broader than the frog, 

 and welded to the shoe. This bar, when the cleft 

 of the frog is diseased, is slit open in the middle." 

 But all that we have seen in use are without the 

 slit represented in the cuts ; and the ivekling on of 

 the bar is greatly objectionable, inasmuch as the 

 chief strain is at the junction of the bar with the 

 shoe or tip, and we have often seen the bar break 

 off here, or else by its lever force draw the nails, 

 and throw the patent shoe altogether. 



" When the ground is dry, the crust and sole 

 strong, and the heels of the hoof high, the shoe 

 should be made about an inch shorter than the 

 ordinary shoe, as fig. 5, or shorter still, as fig. 6, 

 with the hinder parts bevelled, but the heels of the 

 frog-bar for contracted hoofs should not exceed 

 the level of the heels of the crust or shoe." The 

 patentee promised himself and the public great ad- 

 vantages from his contrivance, which we could never 

 perceive it possessed ; notwithstanding the public 



