942 On the Salts, called Puckwah and PhooUKharee. [No. 120. 



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The following is the necessary apparatus, all of which can 

 be made or procured in the bazar : — 



1. A glass tube about 0.5 inches in diameter, and 10 

 inches high, as in the marginal sketch. It is graduated to 

 25 divisions, on the principle shewn in the next section. 



2. A common precipitating glass, containing about a quar- 

 ter of a pint. 



3. A pair of common medicine scales, with a single brass 

 weight of 100 grains. 



4. A bottle of solution of Acetate of Barytes, of the 

 strength shewn in the next section. 



5. A iew straws, or a bone or ivory rod, for stirring the 

 solution of the suspected salt. 



-20 



J-2^ 



15 



To detect an adulteration. 



A. Weigh 100 grains of any suspected Salt, and put it 



into the precipitating glass, fill the glass two-thirds full of 



clear water, and stir the salt till all has dissolved. A iesv 



grains will perhaps remain at the bottom, but these, which 



are sand and sulphate of lime, are of no consequence. Let 



_ the whole settle for a few minutes. 



B. Fill your test tube from the bottle of Acetate of Barytes 

 exactly to the upper mark. 



C. Drop now, carefully, the liquid from your test tube into the 

 solution of the salt. If there is any adulteration a heavy white cloud 

 will be seen rolling quickly to the bottom. You must continue to 

 drop in the solution till there is no more of this cloud ; taking care 

 that you allow it to settle from time to time, and not to put in too much 

 of the test, particularly at the latter end of the operation. 



D. The quantity of solution you have used, will be seen by look- 

 ing at the tube. If it is 10, or 12, or 15, this is an adulteration of so 

 much Kharee per cent, in your sample ; and if it exceeds* — per cent, 

 the Salt must have been purposely and illegally mixed with Kharee. 



* This blank will be of course better filled up by you. It would be proper to 

 make a set of trials with various Government salts before definitively settling it. 

 It will never 1 think exceed 4 per cent., or at most 5. 



