strict digraph  {
	node [label="\N"];
	0	 [label=""];
	238	 [label="Causes of Variability."];
	0 -> 238	 [label="1866, 1869, 1872"];
	2	 [label="WHEN we"];
	0 -> 2	 [label="1859, 1860, 1861"];
	1	 [label=""];
	242	 [label=compare];
	2 -> 242	 [label="1869, 1872"];
	4	 [label="look to"];
	2 -> 4	 [label="1859, 1860, 1861, 1866"];
	6	 [label="the individuals of the same variety or sub-variety of our older cultivated plant\
s and animals, one of the first points which strikes"];
	4 -> 6	 [label="1859, 1860, 1861, 1866"];
	243	 [label=us];
	6 -> 243	 [label="1869, 1872"];
	28	 [label="us,"];
	6 -> 28	 [label="1859, 1860, 1861, 1866"];
	29	 [label="is, that they generally differ"];
	28 -> 29	 [label="1859, 1860, 1861, 1866"];
	36	 [label="from each"];
	29 -> 36	 [label=1869];
	35	 [label=more];
	29 -> 35	 [label="1860, 1861, 1866, 1872"];
	34	 [label=much];
	29 -> 34	 [label=1859];
	34 -> 35	 [label=1859];
	35 -> 36	 [label="1859, 1860, 1861, 1866, 1872"];
	39	 [label="than do the individuals of any one species or variety in a state of nature."];
	35 -> 39	 [label=1869];
	38	 [label="other,"];
	36 -> 38	 [label=1859];
	235	 [label=other];
	36 -> 235	 [label="1860, 1861, 1866, 1869, 1872"];
	38 -> 39	 [label=1859];
	244	 [label="And if"];
	39 -> 244	 [label="1869, 1872"];
	54	 [label=When];
	39 -> 54	 [label="1859, 1860, 1861, 1866"];
	55	 [label="we reflect on the vast diversity of the plants and animals which have been culti\
vated, and which have varied during all ages under the most different climates a\
nd treatment,"];
	54 -> 55	 [label="1859, 1860, 1861, 1866"];
	84	 [label="I think"];
	55 -> 84	 [label="1859, 1860, 1861, 1866"];
	86	 [label="we are driven to conclude that this"];
	55 -> 86	 [label="1869, 1872"];
	84 -> 86	 [label="1859, 1860, 1861, 1866"];
	93	 [label=greater];
	86 -> 93	 [label=1859];
	236	 [label=great];
	86 -> 236	 [label="1860, 1861, 1866, 1869, 1872"];
	94	 [label="variability is"];
	93 -> 94	 [label=1859];
	97	 [label="due to our domestic productions having been raised under conditions of life not \
so uniform as, and somewhat different from, those to which the parent-species"];
	94 -> 97	 [label="1869, 1872"];
	96	 [label=simply];
	94 -> 96	 [label="1859, 1860, 1861, 1866"];
	96 -> 97	 [label="1859, 1860, 1861, 1866"];
	122	 [label=have];
	97 -> 122	 [label="1859, 1860, 1861, 1866"];
	246	 [label=had];
	97 -> 246	 [label="1869, 1872"];
	123	 [label="been exposed under nature. There"];
	122 -> 123	 [label="1859, 1860, 1861, 1866"];
	128	 [label="is,"];
	123 -> 128	 [label="1859, 1872"];
	237	 [label=is];
	123 -> 237	 [label="1860, 1861, 1866, 1869"];
	129	 [label="also,"];
	128 -> 129	 [label="1859, 1872"];
	130	 [label="I think,"];
	129 -> 130	 [label="1859, 1860, 1861, 1866, 1869"];
	132	 [label="some probability in the view propounded by Andrew Knight, that this variability \
may be partly connected with excess of food. It seems"];
	129 -> 132	 [label=1872];
	130 -> 132	 [label="1859, 1860, 1861, 1866, 1869"];
	154	 [label=pretty];
	132 -> 154	 [label="1859, 1860, 1861, 1866"];
	155	 [label="clear that organic beings must be exposed during several generations to"];
	132 -> 155	 [label="1869, 1872"];
	154 -> 155	 [label="1859, 1860, 1861, 1866"];
	166	 [label=the];
	155 -> 166	 [label="1859, 1860, 1861, 1866"];
	167	 [label="new conditions"];
	155 -> 167	 [label="1869, 1872"];
	166 -> 167	 [label="1859, 1860, 1861, 1866"];
	169	 [label="of life"];
	167 -> 169	 [label="1859, 1860, 1861, 1866"];
	171	 [label="to cause any"];
	167 -> 171	 [label="1869, 1872"];
	169 -> 171	 [label="1859, 1860, 1861, 1866"];
	174	 [label=appreciable];
	171 -> 174	 [label="1859, 1860, 1861, 1866, 1869"];
	251	 [label=great];
	171 -> 251	 [label=1872];
	175	 [label="amount of variation; and"];
	174 -> 175	 [label="1859, 1860, 1861, 1866, 1869"];
	241	 [label="that,"];
	175 -> 241	 [label="1866, 1869, 1872"];
	179	 [label=that];
	175 -> 179	 [label="1859, 1860, 1861"];
	180	 [label="when the organisation has once begun to vary, it generally"];
	179 -> 180	 [label="1859, 1860, 1861"];
	247	 [label="con- tinues"];
	180 -> 247	 [label=1869];
	190	 [label=continues];
	180 -> 190	 [label="1859, 1860, 1861, 1866, 1872"];
	249	 [label=varying];
	190 -> 249	 [label=1872];
	191	 [label=to];
	190 -> 191	 [label="1859, 1860, 1861, 1866"];
	192	 [label=vary];
	191 -> 192	 [label="1859, 1860, 1861, 1866"];
	209	 [label="under cultivation. Our oldest cultivated plants, such as wheat, still"];
	192 -> 209	 [label="1869, 1872"];
	193	 [label="for many generations. No case is on record of a variable"];
	192 -> 193	 [label="1859, 1860, 1861, 1866"];
	204	 [label=being];
	193 -> 204	 [label="1859, 1860, 1861, 1866"];
	250	 [label=organism];
	193 -> 250	 [label="1869, 1872"];
	205	 [label="ceasing to"];
	204 -> 205	 [label="1859, 1860, 1861, 1866"];
	207	 [label="be variable"];
	205 -> 207	 [label="1859, 1860, 1861, 1866"];
	205 -> 192	 [label="1869, 1872"];
	207 -> 209	 [label="1859, 1860, 1861, 1866"];
	220	 [label="yield new varieties: our oldest domesticated animals are still capable of rapid \
improvement or modification."];
	209 -> 220	 [label="1869, 1872"];
	219	 [label=often];
	209 -> 219	 [label="1859, 1860, 1861, 1866"];
	219 -> 220	 [label="1859, 1860, 1861, 1866"];
	220 -> 1	 [label="1859, 1860, 1861, 1866, 1869, 1872"];
	235 -> 39	 [label="1860, 1861, 1866, 1872"];
	235 -> 35	 [label=1869];
	236 -> 94	 [label="1860, 1861, 1866, 1869, 1872"];
	237 -> 129	 [label="1860, 1861, 1866, 1869"];
	238 -> 2	 [label="1866, 1869, 1872"];
	241 -> 180	 [label="1866, 1869, 1872"];
	242 -> 6	 [label="1869, 1872"];
	243 -> 29	 [label="1869, 1872"];
	244 -> 55	 [label="1869, 1872"];
	246 -> 123	 [label="1869, 1872"];
	247 -> 249	 [label=1869];
	249 -> 193	 [label="1869, 1872"];
	250 -> 205	 [label="1869, 1872"];
	251 -> 175	 [label=1872];
}
