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Liquor Iodi Compositus — Compound Solution of Iodine 



Iodine 2.5 6m. 



Potassium Iodide 5.0 Gm. 



Distilled Water, a sufficient quantity 



to make 50.0 Gms. 



Dissolve the iodine and potassium iodide in a sufficient quantity 

 of distilled water to make the product weigh 50.0 grams. Keep the 

 solution in a glass stoppered bottle. 



Remarks: — This solution is commonly called "Lugol's Solu- 

 tion". It contains five per cent, of Iodine dissolved in water by 

 means of ten per cent, of Potassium Iodide. This shows the inter- 

 esting fact that while iodine is sparingly soluble in water, it is 

 freely so in solutions of potassium iodide. 



LiQiOE Plumbi Subacetatis — Solution of Lead subacetate 



An aqueous solution which should contain in solution not less 

 than 18 per cent, of lead. 



Lead Acetate 18.0 Gm. 



Lead Oxide 11.0 Gm. 



Distilled Water, a sufficient quantity 



to make 100.0 Gms. 



Dissolve the lead acetate in 70 mils of boiling distilled water 

 and add this solution slowly and in portions to the lead oxide, which 

 has previously been rubbed to a smooth paste with 10 mils of dis- 

 tilled water, and place in a porcelain dish of about 100 mils ca- 

 pacity. Boil this mixture during half an hour with occasional 

 stirring, adding distilled water as required to maintain about the 

 original volume. Finally when cool, filter the solution, protect- 

 ing it as much as possible from the air, and add sufficient distilled 

 water, which has previously been boiled and cooled, to make the 

 finished product weigh 100 grams. Keep the solution in well stop- 

 pered bottles. 



Remarks -. — The above solution is known as Goulard's Extract. 

 It is used externally as a sedative astringent wash in minor skia 



