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 

 acid. 



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 03360 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 a,cid, 5-2012 grams (4-66 per cent) was in combination with 

 ferrous iron as FrClg, and 0-6570 grams (0589 per cent) was in combination with 

 ferric iron as FrCl.,. 



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 1-1150 



Percentage ferrous chloride 8 24 



ferric " 873 



freeHCl 0474 



J. C. MURRAY, 



School of Mining, Kingston, Ont. 



