72 



Trans. Acad. Sci. of St. Louis. 



In 1865 Goldsmith Maid began her career as a trotter, at 

 the age of eight years. In the nine years which followed, 

 her speed steadily increased, and is represented by the 

 equation 



sr= 131.0 + 13. 5e" 



- 0.193< 



Her track record for this period is given in the following 

 table, and the speed computed from the last equation is given 

 in the fourth column of the table. 



GOLDSMITH MAID. STANDARD TKACK RECORDS. 



Another horse, American Girl, 1862, began her track 

 record in 1867, and reached her best speed in 1874. Her 

 change in speed is represented by the equation 



5=136.4 + 14.46e 



— 0.707< 



AMERICAN GIRL. STANDARD TRACK RECORDS. 



The last record that will be given is that of Judge Fid- 

 lerton, 1865, whose track record covers the years 1871-5 in- 

 clusive. 



