the Periodic Law of the Chemical Elements. 

 Table I. 



99 



Even Series. 



I. 



II. 



Odd Series. 



I. 



II. 



Atomic 



weight. 



A. 



c. 



(Calc.) 



A 



Atomic 



weight. 



A. 



c. 



(Calc.) 



A 



m-\- *Jv 



m-\- Vy 



Series II. m—0. 



(H=l) 



7-0 



9-1 

 109 

 12-0 

 140 

 160 

 18-9 



Mean... 



7-00 

 6-45 

 6-30 

 6-00 

 6-25 

 6-53 

 7*13 



6-52 



6-50 

 6-24 

 6-54 



6-86 

 7-09 

 6-98 

 7-06 



6-75 



Series III. m=2%. 



230 



24-4 1 



27-0 



28-3 2 



31-0 



32-0 



35-4 



Mean... 



6-57 

 6-24 



6-38 

 6-29 

 6-54 

 6-46 



6-87 



6-48 



Beryllium 



Magnesium 



Boron 



Carbon 



Aluminium 



Silicon 





Phosphorus 













Series IY. m=5. 

 Potassium 



39-0 

 40-0 

 440 

 48-0 

 51-3 

 52-0 

 54-0 



Mean... 



Series V. m=8%. 



63-3 

 65-3 



68-9 

 72-3 

 74-9 



78-8 

 79-8 



Mean... 



666 

 659 

 6-73 

 6-88 

 6-97 

 7-20 

 7-16 



6-88 



Calcium . , 





Scandium 



Grallium 



Titanium 



Germanium 





Chromium 



Selenium 



Manganese 







Series VI. m=12. 

 Rubidium 



85-3 

 87-4 

 89-8 

 90-4 3 

 94-0 3 

 95-5 



Mean... 



6-56 

 6-52 

 654 

 6-46 

 6-60 

 6-61 



Series VII. m=15%. 



107-7 



111-8 



113-4 



117-7 



119-6 4 



125-0 5 



126-5 



Mean... 



6-53 

 6-61 

 6-58 

 6-72 

 6-74 

 6-96 

 6-97 



6-73 



Strontium 





Yttrium 







Tin 



Niobium 





Molybdenum 



Tellurium 







6-55 



Series VIII. m=19. 

 Caesium 



132-6 



136-8 



138-0 6 



139-9 7 



142-0 8 



Mean... 



6-61 

 6-70 

 666 

 6-66 

 6-69 



6-66 



Series IX. m=22%. 

 Wanting. 







Barium 



Lanthanum 



Cerium 



Didymium 





1 Marignac (1884). 



" Meyer, Mod. Theor. p. 89 (1888). 



Cleve (1883). 



Thorpe & Young (1887). 

 Cooke. 5 Brauner (1883). 

 8 Cleve (1883). 



H2 



