26 



REPORT — 1875. 



11. If a native Phosphate containing oxides 

 of Iron, Aluminium, and Calcrura, and 

 Phosphoric Acid has been acted on by 

 Sulphuric Acid, in what forms do you 

 suppose the Phosphoric Acid exists? 

 and how would you state the analysis ? 



12. Wliat means should be adopted to in- 

 sure the samples submitted to Chemists 

 for analysis fairly representing the com- 

 position of the bulk ? 



13. Will you give tlie Committee the details ") 



of the process which you consider the 

 best for the estimation of Potassium in 

 commercial Potash Salts? \^Tiat are 

 the limits of error in the process ? 

 Are accurate results obtainable by it 

 in the hands of mipractised manipula- 

 tors? 



14. Which, in your opinion, is the correct "> 



mode of stating the analyses of Com- 

 mercial Potash Salts, containing Soda 

 and more than one Acid — e.g. com- 

 mercial " Muriates," Sulphates, Ni- 

 trates, Carbonates, Potashes, and Pearl- 

 ashes ? ) 



15. Can you give the Committee the name 

 and address of any Chemist not a 

 Fellow of the Cbemical Society of 

 London whose advice and opinion 

 would be likely to be of service ? 



16. 



Write here your name and address, and 

 please state quahfications or nature of 

 any appointment. 



Ko effort has been spared to make the objects of the Committee widely- 

 known, and nearly a thousand circulars hare been distributed. 



In the case of chemists kno'n'n to have special knowledge of the subjects 

 on which information was desired, the circulars were accompanied by 

 manuscript letters from the Secretary requesting careful consideration of 

 and full replies to the queries. 



In answer to their request for information, the Committee has received 

 contributions from a considerable number of chemists, both in England and 

 on the Continent, the answers in many cases containing much original 

 information, and being generally of the utmost value in enabling the Com- 

 mittee to form an opinion on the present state of the questions which it was 

 appointed to consider and report on. 



On receipt of the replies, a firrther correspondence was in many cases 

 entered into by the Secretary, with the view of obtaining explanation of or 

 further information upon doubtful points, and every means has been taken 

 to elicit the views of correspondents. 



The following is an alphabetically arranged list of chemists to whom the 

 Committee is indebted for information: — 



G. Beeeand, Ph.D. Manager of TJnited Chemical Works of Leopoldshall. 

 CnAs. Bloxam. Professor of Chemistry, King's College, London. 

 T. P. Blunt, M.A. Chemist to Shropshire Chamber of Agriculture. 



