244 Dr. E. J. Mills on Gladstone's Experiments 



V. Ferric Chloride and Potassic Sulpho cyanide (he. cit. p. 189, 

 pi. 7. fig. 1). — This experiment is described as " precisely ana- 

 logous to the preceding." The equation is 



2/=406 (-8900)^ + 214 (-2500)*; 



and the unit of x is 20 equivalents. 



TA.BLE III. 





X. 



y, calculated. 



y, found. 





1 



66-9 



65-0 





2 



540 



540 





3 



467 



46-9 





4 



41-2 



41-2 





5 



36-6 



36-8 





6 



32-6 



33-2 





7 



29-0 



29-5 





8 



25-8 



25-8 





9 



22-9 



229 





10 



20-4 



200 





11 



182 



173 





12 



16-2 



148 



VI. Ferric Nitrate and Hydric Sulphocyanide (loc. cit. p. 190, 

 pi. 8. fig. 2). — Ferric nitrate, i equivalent. Unit ofx = 4 equi- 

 valents. The equation is 



2/=535-5 ('91093)* + 89-5 (-82670)', 

 Table IV. 



a\ 



y, calculated. 



y, found. 



1 



827 



827 



2 



72-6 



731 



3 



65 3 



65-3 



4 



591 



5S-9 



5 



538 



53-9 



6 



490 



49-6 



7 



446 



45-3 



8 



406 



41 3 



9 



370 



376 



10 



337 



34-4 



11 



307 



31-2 



The above results seem to have been the sequel of consider- 

 able experience with the method, and are in exceptional ac- 

 cordance with theory. 



VII. Ferric Citrate and Hydric Gallate (loc. cit. p. 193, pi. 9. 

 fig. 1). — One equivalent of ferric citrate was mixed with 5 &c. 

 equivalents of hydric gallate, and the increasing black coloration 

 measured. Unit of x = 3 equivalents. The equation is 



?/=660 (-9127)* + 90 (-3072)*. 



