532 Mr. A. Griffiths 



on an 



Apparatus for the Determination 



diffused per second, the shaded area between the asymptote 

 and the curve is independent of the coefficient of diffusion. 



y 





Fig. 2. 







p 



■p^- 





o 







a: 



The table below gives an idea of the rate at which the 

 steady state is attained when L = 4*043, and £ = 3xl0 -6 . 

 The unit of quantity is the amount transmitted per week on 

 the attainment of the steady state. 



No. of Weeks. 



Total Quantity. 



1 



2 



3 



4 

 5 

 6 



7 



8 



9 



10 



0-104 

 0703 

 1-567 

 2519 

 3505 

 4-500 

 5-498 

 6-498 

 7-498 

 8-498 



Quantity per Week. 



0104 

 0-599 

 0864 

 0-952 

 0-986 

 0-995 



[The above table gives the integral quantities transmitted. 



The curve already mentioned shows the way in which the 



L 2 

 rate of transmission varies. The unit abscissa -^jy log«f = 



2626 of a week.] 



ir l k 



Section III. — Error due to Differences of Temperature, 

 The object of this section is to obtain the order of mag- 

 nitude of the errors produced by differences in temperature 

 between the various tubes. 



