304. W. H. Brewer—Lvolution of the Trotting-Horse. 
I leave it to mathematicians to plot the curves which imme- 
diately suggest themselves, and determine how fast horses will 
ultimately trot and when this maximum will be reached. 
TABLE SHOWING THE NUMBERS OF HORSES UNDER THE RESPECTIVE RECORDS. 
2:30 2227 2:25 2:23 2221 2:19 
or or or or or or 
better. | better.| better. | better. | better. | better. 
1843 - 
1844 2 1 
1849 7 2 
1852 10 3 
1853 14 5 
1854 16 6 
1855 19 6 
1856 24 (4 z 
1857 26 7 2 
1858 30 qT 2 
1859 32 9 2 1 ] 
1860 40; ll a 2 1 
1861 48; 14 4 2 1 
1862 Lt 7 4 M 
1863 59) 19 9 4 Be 
1864 66| 22 12 4 1 
186 29 15 5 2 1 
1866 101; 32 ct 6 3 1 
1867 124} 42 21 9 5 2 
1868 146} 52 28 13 6 2 
1869 Lt SG 34 15 10 4 
1870 194} 72 35 16 ll 5 
1871 233 | 99 40 17 12 6 
1872 Sao |) os te we Ze Se 
1873 BrG4) se 74 28 15 5 
1874 H0G [0 40 16 11 
1875 ~n aa 134 61 30 i3 
1876 194 165 81 39 16 
1877 836 ps 214 105 51 19 
1878 | 1,025] —-- 270 129 68 24 
1879 | 1,142 | 2. 325 64 88 33 
1880 | 1,210) —. 366 192 106 4] 
1881 soon | us 419 27 126 49 
1882 | 1,684; ~~. 495 275 156 60 
2:17 2:15 2:13 2:11 
or or or or 
better. | better. | better. | better. 
1 
5 1 
5 2 
6 2 
8 2 
9 4 
11 5 1 
14 6 2 1 
15 7 2 1 
18 s 2 1 
