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THE YEAR-BOOK OF AGRICULTURE. 



draw light and score easy, and are locked to the frame by a hook tongue and groove C C C, 

 and one carriage-bolt, which bolt is the weakest part of the fastening ; and in case of run- 

 ning hard against any obstacle, where something must break, the bolt will break first, merely 

 letting the plow drop off. A new bolt, costing less than five cents, repairs the break per- 

 fectly. The inventors say of it : 



" This implement is designed for all kinds of crop-plowing or summer fallow ; also for 

 plowing corn, oats, and barley stubble, and fitting land for seed generally. It. is a good im- 

 plement for covering all kinds of seed sown broadcast; it has been used in almost every 

 variety of soil, and has given universal satisfaction. It is well adapted to the soil in the 

 Western States and the plantations of the South. It works first-rate in muck, clay, and 

 gravel. The material of which this plow is made, being iron, is strong and durable ; the 

 wheels are large, and having wrought-iron spokes and tire, are strong and light ; it affords 

 facility for changing the depth of the plows, and changing the quantity of land ; it requires 

 no holding, and is easily turned round ; a boy that can drive the off-horse in the furrow can 

 do as good work as a plowman ; and it will work hard land that cannot be worked with a 

 cultivator. The shears cut the whole surface of the ground, and turns it over ; it is very 

 convenient for carrying off loose stones from the field while plowing." 



Improved Rotary Cultivator. 



THE annexed engravings represent an improved rotary cultivator, the invention of H. M. 

 Johnson, of Carlisle, Pennsylvania. 



Fig. 1. Fig. 2. 



Fig. 1 represents the machine in perspective, and fig. 2 represents a section, the nature of 

 which will be shown in the following description : 



It is only within the past three or four years that this class of agricultural implements 

 has appeared to dispute the ground so long occupied by the ordinary cultivator in general 

 use ; and in England, where so much attention is bestowed upon this important branch of 



