77 



sav a few words. I have so often noticed the utter 

 impossibility, of spreading anything evenly with the 

 shovel, that I w r as induced to invent, and then take 

 out a patent for a machine, which will sow from three 

 bushels to 300 per acre of material as fine as plaster, 

 or as course as the grains of Indian corn. Its cheap- 

 ness, simplicity and durability will recommend 

 it to every one. It consists in a hollow cylinder 

 or drum, from 6 to 12 feet in length, and from 2 to 

 3 feet in diameter. It is formed of long boards or 

 vanes, which have one edge fastened by a hinge at 

 each end to a drum head, and also by a hinge to a 

 drum head in the middle. The free edge of every 

 board over-laps the hinged edge of the vane next to it. 

 By means of movable bolts, the space between the 

 over-lapping edge can be adjusted, to the 32nd of an 

 inch, or to a whole inch if desired. A shaft runs 

 through the drum and has a wheel at each end. 

 One wheel is fastened to the drum to turn it. 



CHAPTER XIX. 



THE PRESERVATION OF HEALTH OX THE FARM. 



The human body is composed of fourteen elements. 

 These are carbon, hydrogen, oxygen, nitrogen, phos- 

 phorus, sulphur, calcium, magnesium, potassium, 

 sodium, chlorine, iron, fluorine and silicon. 



All our flesh and bones, the brain and nerves, and 

 blood are made of these elements, in a state of combi- 

 nation. 



Perfect health, consists in the perfect preservation 

 of the relative proportion of these compounds. 



If the mineral matters should predominate for some 

 time in the blood, the capillary system that is, the 



