150 TESTS FOR METHYL ALCOHOL BY E. W. TODD, B. A. 



(2) 10% methylated spirits to which a drop of formalde- 



hyde was added after oxidation by the copper 



spiral. 



Result: Fine pink colour changing to brownish. 



(3) Repeated (1). Result: Yellowish colour, slight tur- 



bidity. 

 Morphine Test — 



Preliminary Experiment. 



To a solution of morphine in cone, sulphuric acid 

 was added a little dilute formaldehyde solution. 

 Result: Distinct violet colour. 



(1) To a solution of morphine in concentrated sulphuric 



acid was added a 2% methyl alcohol solution 

 oxidized three times by a copper spiral. 

 Result: Violet colour not so distinct as above. 



(2) Same as (1), only ethyl alcohol about 10% used. 



Result: No colour. 



(3) Same, only 10% solution of methylated spirits used. 



Result: No good colour obtained. 



(4) Same, only full strength methylated spirits used. 



Result: A violet coloured ring. 



In each case, the spirit was oxidized by a copper spiral. 



Test Using Milk and Resorcinol. 



The results were not found to be consistent — in some cases, 

 the milk apparently contained a preservative that interfered 

 with the test. 



The milk, of course, should be tested for formaldehyde 

 before using in these experiments. 



Preliminary Experiment. 



To some dilute formaldehyde solution a few drops of dilute 

 resorcinol solution were added. This mixture was poured 

 down the side of a test-tube on top of a few cubic centimetres 

 of concentrated sulphuric acid. 



Result: A fine rose-pinkring obtained atthe junc- 

 tion of the solution and acid. 



