332 Vobimetrical Method /or the Estimation of Yellow Prussiatc of Potash. 



Mr. Alexander Hastie, M.P., and requesting Mr. Murray to present the 

 Memorial to the Town Council, and Dr. Aitken and Bailie Harvey to 

 support its prayer. 



Mr. Bryce described, with the aid of various maps prepared for the 

 occasion, the geography of the Seat of War. 



March 22, 1854. — The President in the Chair. 



Mil. RoBEET^GAEDiKEE^Jwas admitted a member. 



Mr. Cockey, the Librarian, laid on the table. No. 7 of the Proceedings 

 of the Literary and PhUosophical Society of Liverpool, presented by the 

 Society. Thanks voted. 



Mr. Alexander A. Fergusson read " Notes of a Two Months' Sojourn 

 in Egypt." 



• Api-il 5, 1854. — Tlie President in the Chair. 



Me. WALLACE^read a'notice " On Red Prussiate of Potash." 

 Mr. Cockey read a paper " On a Decimal Coinage.' 



April 19, 1854. — The President in the Chair. 



It was agreed, on the recomn~.endation of the Council, that an extra 

 meeting of the Society should be held on the 3d of May, to overtake the 

 arrears of business. 



Mr. Macadam read " Observations on the Comparative Purity of 

 Waters in use for Domestic and Manufacturing Pm-poses in different 

 pai-ts of Scotland ; with recent Analyses of the Mmeral Wells of Moifat." 



Mr. Wallace read a paper " On the Oxidizing power of Ked Prussiate 

 of Potash ;" after which he described the following 



Volumetrical method for the Estimation of Yellow Prussiate of Potash. 



The following process was proposed some years ago, but was not con- 

 sidered of sufficient general interest or importance for publication in a 

 separate form. The author was led to search for such a process, in con- 

 sequence of having been requested by an extensive manufacturer of the 

 salt in question, to find a simple and available method of testbg what 

 are technically called the prussiate calces. 



The process is thus conducted. 100 grains of the salt are dissolved in 

 two ounces of cold water and a quarter of an ounce of concentrated 

 hydrochloric acid is added to the solution. An alkalimcter of one hun- 



