18 



MARINE AND FISHERIES 



1-2 EDWARD VII., A. 1902 



App. No. 3. 



School of Mining, 



Kingston, Ont., November 13, 1900. 



Report on Examination of Nail Waste. 



Qualitation. — Iron, traces of silica and zinc and of organic matter. Hydrochloric 



«,cid. 



Quantitation. — Specific gravity of liquid = 1*1150. 



By titration with KNMO4, the total iron present was determined to be 4-3260 

 grams per 100 cc, or 3-88 per cent by weight. Of this iron, 3*9900 grams occurred in 

 the ferrous state (3*57 per cent), and 0*3360 grams occurred in the ferric state (0*3013 

 per cent). 



The total acidity, combined and free hydrochloric acid, was determined to be 6*3875 

 grams per 100 cc , or 5*7286 per cent by weight. Of this, 5-8582 grams (5*25 per cent) 

 occurred in combination with the iron, and 0*5293 grams (0 474 per cent) occurred as 

 free acid. Of the combined acid, 5*2012 grams (4*66 per cent) was in combination with 

 ierrous iron as FrC^, and 0*6570 grams (0*589 per cent) was in combination with 

 ferric iron as FrClg. 



When one-tenth of 1 per cent (0*1 per cent) of this liquid was poured into a vessel 

 containing 2 litres of water (tap water), a turbidity occurred at once and an adhesive 

 precipitate of ferric hydroxide continued forming for several hours. 



After between six and eight hours the precipitation seemed complete. The vessel 

 -was allowed to stand undisturbed for two days ; the precipitate was then filtered off 

 and washed 



Nearly the total iron contents of the two cubic centimetres of the liquid was pre- 

 cipitated by dilution, in this instance, to 2 litres. Out of a posssible precipitation of 

 0*0836 grams iron, 0*0798 grams iron, was actually precipitated as ferric hydroxide. 



Summary. 



Specific gravity 



Percentage ferrous chloride 

 " ferric " 



freeHCl 



1*1150 

 8*24 

 0*873 

 0*474 



J. C. MURRAY, 

 School of Mining, Kingston, Ont. 



