PAPERS OX CHEMISTRY AND PHYSICS 293 



method here described of tiuding the minimum interval 

 between coincidences. 



Finally, when all the errors are included in measuring 

 both the length and the period of the pendulum, in the 

 hands of our students in Knox College this method yields 

 results ranging from 980.2 to 980.4. 



The theoretical value of "g" for Galesburg is 9S0.26. 



