A number of travel-time tables have been constructed by many seismologists using different data and methods. Jeffreys and Bullen (1940) and Gutenberg and Richter (1934-1939) are by far the best travel-time tables made till late thirties. Since then the number and quality of seismological stations have increased considerably. Nuclear and other kinds pf explosions have also contributed greatly in reducing the uncertainties. With these new assets seismologists from western countries, mostly 7 from United States, decided to attempt for a new set of P travel-time tables. They used data from 300 stations recording 400 earthquakes and 30 explosions and employed the method similar to that used in making Jeffreys and Bullen (1940) tables. These finally culminated into Herrin et al. (1968) tables. On comparison with Jeffreys and Bullen (1940) tables, it was revealed that the amount of accuracy achieved in the new tables differs very little from 1940 tables for distances more than 20° epicentral distance. It was thus concluded that efforts in improving upon the 1940 tables will yield little than desirable.