INDEX. 



PAGE. 



Alden & Co., cultivator 254 



Alger, Cyrus, annealing cast iron 



plows, 1839 117 



American, early plow 65 



Berkshire plow, preferred by TuU.. . 17 



Brand's (Suffolk) plow 22 



Burch, L. D., Swivel plow 249 



Burden, Henry, plow 90 



Burrall, T. D., patent for diminishing 



friction of land side, 1843 117 



Carbonic acid a solvent 143 



Carpenter, Levi 101 



Caschrom (British plow) 9 



Centre draught (Mears' invention). . 100 



(Prouty & Mears) 165 



Chapman & Barnum, device for 



diminishing friction of land side.. 127 



Chenoweth, R. B., patent «. 71 



Chinese plow 13 



Conkling, James H 151 



Coulter, devices for clearing 200 



draughtof 182 



elevation and set of 183 



Mr. Stephens' experiments on 



draught of 182 



varieties of form and attach- 

 ment 180 



Cultivators, Alden & Co 254 



Ford & Howe's 259 



Hawks' 256 



McQueston's 261 



Phifer's 256 



Rules for trial 208 



Davis, Gideon, patent and construc- 

 tion 72 



Deep plowing, effect of 146 



Denver, John, patented a plow 1803. 69 



Ditching machine 243 



for under-draining 245 



Draught of plows (see " Plows, 



draught of") 154 



Draught of plows, planes of resistance 167 



point of resistance 168 



angle of 169 



experiments on 177 



ditference of plowmen 179 



1820 89 



Dutcher, J., letter on the " Historj'^ 



of the Plow " 94 



PAGE. 



Dynamometer at trial of plows, 1820. 89 



East Indian plow 10 



East Lothian plow 35 



Egyptian plow, ancient 8 



now in use 12 



Elasticity of furrow slice 153 



English plow, A. D. 1470 13 



Fast-walking draught beasts, value of 165 



Fertility, causes of 136 



Fords & Howe, cultivator 259 



Four-coultered plow 18 



Four coulters, use of 18 



French (Canadian) plow 16 



Grant's lona plow 129 



Handley, Mr., experiments between 



Swivel plows and wheel plows 177 



Harris, Hezekiah, patent 1804 69 



1808 71 



Harris, Zadock, pat. and specification 82 



Harrows, rules for trial 207 



J.E.Morgan's 251 



F . Nishwitz's 253 



Hawks', N., Ditching plow 243 



cultivator 256 



Heath, E., Ditching machine 245 



Hingham's Self-holding plow 91 



Hitchcock, David, plow, 1823 91 



Holbrook, F. F., method 129 



Horton, Frost 101 



lona plow, Grant's 129 



Jacobs, James, patent 1834 107 



Jefferson, Mr ,constructionof hisplow 23 



objections to the same 32 



suggestions of cast iron for 



mould-boards 33 



suggestion of two wedges 22 



Klay, John, patent 72 



Kiliuer, J. & A., invention 200 



Knox, James A., patent 1852 117 



Lanarkshire plow 50 



McCorraick's plow 99 



McQueston's cultivator 251 



Mead's patent, 1863 127 



Mears, John 100 



Mexican plow 12 



Mid-Lothian plow 51 



Minor & Horton 101 



Minor, Truman 101 



Modern English plows 59 



