50 Coward & Harden, Da/ton's Lecture Sheets. 



the same diameter and the others follow in order of 

 decreasing size. Slight differences exist between the 

 values employed in this diagram and those given in the 

 note-books and in the " New System," as is seen from the 

 following list : 



No. of 

 figure in 

 Diagram. 



Diameter of the Atom. 



On Diagram. 



Note-book 



i., 258, 



19 Sep., 1803. 



(Calculated to 



hydrogen unity) 



Note-book 



ii., 107, 



14 Sep., 1804. 



' New System," 



I. ii., 560, 



1810. 



I 





I 



1 



1*000 



2 





1*143 



— 



1 00 



3 





0-971 



0952 



0*947 



4 





1*048 



I'OO 



1 00 



5 





1*009 



0*976 



— 



6 





— 



— 



1*12 



7 





— 



I'OO 



I'OO 



8 





1*05 + 



0-993 



1*020 



9 



°'95 



0*981 



0*958 



0*980 



IO 



o"95 



0*971 



0*965 



C909 



ii 



0-85 



0*905 



0*854 







12 



0-87 



— 



0*911 







*3 



o*8o 



o*8io 



0*787 



0"794 



14 



078 



0*762 



0758 



0747 



15 



°'75 



o - 667 



0*652 







16 



o*8o 



0*952 



0*809 



o*8i 



