of Points on a Surface. 

 Experiment II. 



443 



2 



7 



4 



1 



6 



5 



5 



3 



5 



3 



3 



5 



6 



7 



2 



8 



7 



6 



3 



2 



7 



6 



1 



4 



4 



8 



8 



3 



4 



5 



2 



4 







5 



6 



7 



4 



2 



3 



7 



1 



6 



3 



4 



6 



8 



5 



2 



2 



4 



4 



7 



5 



3 



4 



8 

 4 



2 



4 



5 



5 



3 



3 



3 



Number of 







Number of 



A 



squares. 



a square. Observed. 



Calculated 



. . . . 1 



0-8 



1 . 







. 3 



3*4 



2 . 







8 



7-6 



3 . . 







11 



11-2 



4 . 







12 



12-4 



5 . 







10 



10-9 



6 . 







7 



8-0 



7 . 







7 



5-0 



8 . . 







5 



3-0 



Above . 











1-7 



We see from these diagrams that the experiments of Prof. 

 Forbes by no means contradict the forrnulse of probabilities 

 applied to the question of distribution by chance. 



But these experiments are not quite free from objections. 

 It might be stated that by throwing grains of rice on a chess- 

 board we must obtain a more uniform rather than an acci- 

 dental distribution, as it is evident that the number of grains 

 being augmented so as to cover the whole surface of the 

 chess-board, we shall have a pretty equal number of grains 

 on each square. Another arrangement of the same experi- 

 ment may be less objectionable, and I tried it, in order to 

 give a more complete illustration of the application of the 

 principle of random scattering. 



Taking a table of logarithms with seven places, I con- 



