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STATE BOARD OF AGRICULTURE. 



base and the other as the cover. SHts are cut through the sides to the mid- 

 dle three holes of the base and of the cover. Two sets of steel clamps are 

 made and grooves cut into the wood in such a manner that one set can be 

 used to clamp the cover on when the standards are not in use and the other 

 set to clamp the inverted cover beside the base when the combination is to 

 be used as a comparator. 



Fig. No. 3. A combined comparator and storage rack for standards. 



The advantage of this simple rack and comparator is that it furnishes a 

 convenient place for storage of standards away from dust, light and danger 

 of breakage and makes an excellent shipping package. (Fig. 4). Where 



Fig. No. 4. This comparator and rack for standards is furnished with the sets of standards put 

 on the market by Hynson, Wescott and Dunning. 



