52 



THE YEAR-BOOK OF AGRICULTURE. 



Patent Brick. 



The annexed figures are views of au improved brick, for which a patent was recently 



granted to Levi Till, of Sandusky, Ohio. The nature of the improvement consists in forming 



e.irli brick with channels or grooves upon the top, and with projecting conical spurs upon the 



bottom and upon one of its ends. 



Fie. 1. 



Fig. 2. 



Fig. 3. 



Fig. 1 shows the two channels or grooves a a. Fig. 2 represents four projecting conical 

 spurs intended to fit into the grooves a a — the spurs of one brick fitting into the grooves a a 

 of another, and vice verii. Fig. 3 is a side view of a brick, showing the conical spurs b b 

 Y\a 4. in elevation. Fig. 1 represents a small spur e, intended 



only to keep the blioks, H laid in the wall, at such an 

 exact and uniform distance apart as shall leave the 

 /'/■"per space for mortar. Fig. 5 shows a section of 

 wall with the end of a joist h laid upon it, which can 

 be done by the carpenters on each story, as soon as the 

 luirk" are laid, a a and d d show the ends of brick, 

 and // i-' the half brick. A piece e is nailed on the end 

 of tht j"i t to til into the channel of brick, ami which Mtl M I tie. l-'ig. •'> is a perspective 

 view of three of thete brick-. The following extract from the specification Beta forth the 

 advantages claimed tor this brick: 



"It will be perceived at once that in bricks made upon this plan the improvements will 



