474 Mr. R. Colley on a Case of Work 



Nitrate of Silver. 



Table I. 



Tube No. 1. 



1. D. 27-6 — 73-8 46*2 



2. A. 30-2 — 72-1 41-9 



3. D. 28*1 — 74-2 461 



4. A. 31-7 — 73-0 41-3 



5. D. 27-6 — 73-4 45-8 



6. A. 29-7 — 72-3 42-6 



7. D. 28-8 — 74-8 46-0 



Difference D — A = 4*1 



Table II. 

 Tube No. 1. 



1. A. 36-3 — 70-9 40-6 



2. D. 32-3 — 78-5 46-2 



3. A. 35-6 — 77-1 41*5 



4. D. 32-2 — 78-9 46*7 



5. A. 33-9 — 76-8 42*9 



6. D. 30-9 — 76-8 45*9 



Difference D — A = 4*5. 



Table III. 

 Tube No. 2. 



1. A. 66-9 — 27-5 39-4 



2. D. 75-0 — 23-9 51-1 



3. A. 66-4 — 26-3 40-1 



4. D. 74-8 — 25-3 49*5 



5. A. 69-4 — 29-2 40-2 



6. D. 78-5 — 28-7 49-8 



7. A. 73-7 — 30-8 42-9 



8. D. 78-8 — 28-0 50*8 



9. A. 74-7 — 30-8 43*9 



10. D. 79-7 — 31-4 48-3 



11. A. 77-7 — 33-4 44-3 



12. D. 83-3 — 33-6 49*7 



13. A. 80-0 — 36-7 43-3 



14. D. 85-1 — 35-8 49-3 



15. A. 80-2 — 37-7 42-5 



16. D. 85-0 — 37-3 47-7 



17. A. 81-8 — 39-3 42-5 



18. D. 87-1 — 39-4 47-7 



19. A. 83-1 — 40-3 42-8 



20. D. 87-5 — 40-4 47-1 



Difference D - A = 6-9. 



