470 



MR J. Y. BUCHANAN, F.R.S., ON THE 



The analytical details have been collected in a series of tables, as follows : — 



Table I. — Determination of Available Oxygen by the Iodometric Method. 



Number of 

 Sample. 



Weight of 



Sample taken 



(grammes). 



Volume of 



Hyposulphite 



used 



(CO.). 



Equivalent Weight of 



Iodine 

 (grammes). 



c = 0-012316. 



Oxygen 

 (grammes). 



d = 0-0G3c. 



Oxygen 

 per cent. 



e=100- 



a 



Equivalent 



per cent, of 



MnO, 



/=5-4375e. 



I. 



II. 

 III. 

 IV. 



V. 



M 



N 



Q 



K 



R 



0-1711 

 0-2698 



0-1815 

 0-1734 



0-1802 

 0-1620 



0-1924 

 0-1650 



0-1514 

 0-1731 



0-1768 

 0-2210 



0-1859 

 0-2547 



0-1754 

 0-2117 



0-1945 

 0-1815 



0-1116 

 0-1004 

 0553 



0-2286 

 03070 



12-07 

 19-06 



13-52 

 13-03 



12-20 

 11-05 



10-10 



8-657 



8-306 

 9-65 



9-03 

 11-30 



5-936 

 8-17 



8-18 

 9-77 



8-43 



7-83 



8-94 



8-153 



4-401 



9-96 

 13-43 



0-14856 

 0-23465 



0-16647 

 0-16040 



0-1502 

 0-13601 



0-12439 

 0-106567 



0-102246 

 0-11875 



0-11113 

 0-1391 



0-07307 

 0-10057 



0-10073 

 0-1203 



0-10375 

 0-09636 



0-009358 

 0-01478 



0-010486 

 0-010104 



0-009463 

 0-0085677 



0-0078356 

 0-0067129 



0-00644 

 0-0073546 



0-007001 

 0-008762 



0-004603 

 0-006335 



0-006345 

 0-007578 



0-006535 

 0-00607 



0-12296 

 0-16446 



0-007746 

 001036 



5-47 

 5-48 



5-78 

 5-82 



5-25 

 5-29 



4-07 

 4-07 



4-25 



4-25 



3-96 

 3-96 



2-48 

 2-47 



3-62 

 3-58 



3-36 

 3-34 



6-25 

 6-33 

 6-21 



3-39 

 3-37 



29-74 

 29-80 



31-43 

 31-65 



28-55 

 28-76 



22-13 

 22-13 



23-13 

 2313 



21-53 

 21-53 



13-48 

 13-54 



19-67 

 19-47 



18-27 

 18-18 



34-00 

 34-43 

 33-77 



18-43 

 18-32 



Table II 



