288 



Index. 



Fig. page. 



73. fig. 2. Inclined plane or share 



of same 130 



— fig. 3. Transformed No. 1, lona 130 



— fig. 4. Great Trench No. 1 do 131 



— fig. 5. Great Trench No. 2 do 131 



— fig. 6. Trenching plow for loams 



and clay, do 132 



— fig. 7. Large trenching plow . . 132 



— fig. 1 to 8. Diagrams illustra- 



ting the operations of 

 trenching plow . . 133, 134 

 74 to 79. Diagrams illustrating frac- 

 ture of furrow slice 150-152 



80. Section of Prouty & Mears' 

 plow, showing obliquity of land 

 side 168 



81. Diagram of line of draught. .. . 170 



82. Diagram showing increase of 

 resistance of wheel 174 



82 to 86. Forms of plow wheels. . . 180 

 87 to 91. Coulters 181 



92. Fin share 182 



93. Position of coulter, Prouty & 

 Mears' 184 



94. 95. Diagrams of lap furrows, 185, 186 

 96, 97. Diagrams of rotation of fur- 

 row slice 188 



98. Trapezoidal furrow 190 



99. Sod and subsoil furrow 191 



100. Flat furrow sod 191 



101. Stubble furrow 192 



102. Holbrook's sod and subsoil plow 193 

 103 Whiffletrees for three horses . . 195 

 104. Method of attaching three horses 



in New York 196 



Fig. page. 



105. Stephens' method of attaching 

 four horses to the plow 197 



106. Chain attachment for plowing 

 under weeds, &c 199 



107. Kilmer's adjustment for do 199 



108. Device for cleaning the coulter 199 



109. Left hand plow 201 



— figs. 1, 2, 3, 4. Diagrams for 



plowing grounds with- 

 out a dead furrow, 201, 202 



110. Holbrook's No. 66 for stubble 

 lands in stifi" soils 211 



111. Holbrook's No. 66 214 



112,113. Collinsville plow 214 



Holbrook's No. 66 sod plow 217 



114. Holbrook's No. 69 stubble plow 222 



115. Front and rear standard of same 281 



116. Parts of the same 232 



117. Holbrook's No. 69 sod and sub- 

 soil 239 



118. Holbrook's No. 69 sod 241 



119. Hawks' ditching plow 243 



120. do do as cultivator 245 



121. Heath's ditching machine 247 



122. Holbrook's swing or side-hill 

 plow 248 



123. Diagram of Burch's share 249 



124. Morgan's harrow 252 



125. Alden's cultivator 255 



126. do do as corn-marker 255 



127. Phifer's two-horse cultivator.. 257 



128. Fords & Howe, cultivator 260 



129. McQueston's improved culti- 

 vator 262 



PLATES. 



PAGE. 



PLATE I.— Fig. 1. Berkshire plow 18 



" Fig. 2. Four-coultered plow, with parts of same 19 



PLATE II.— East Lothian or Small's plow 36 



PLATE III. — Anal3'tical section of mould-boards: — East Lothian plow; Mid- 

 Lothian plow ; Berwickshire plow ; Lanarkshire plow 46 



PLATE IV. — Analytical sections of mould-boards: — "Western Fifeshire plow ; 



Ransom's F F new mould-board 53 



PLATE V. — Howard's and Ransome's plows 63 



PLATE VI.— Davis' plows 72 



PLATE VII.— McCormick's plow , 99 



PLATE VIII — Knox's forming mould-boards of plows 118 



