256 APPENDIX it. 



when at a later date owing to the submarine campaign the policy of 

 the Ministry changed and it was decided to go to new sources for 

 Nitrogen supply, the results of the research work and of the informa- 

 tion gathered by the Research Department mentioned were ready to 

 hand and enabled practical work on a large experimental scale to be 

 conmienced at once. 



It should be added that tlic'work was taken up for the Conunittee 

 by one of our Members of Council, Dr. J. A. Harker, F.R.S., who was 

 aih)wedby the National Physical Laboratory to assist in this important 

 development, his labours being of the highest value. The Country is 

 greatly indebted to him for the untiring devotion he has shown in 

 working out this special and important subject to a successfid issue. 

 Our Council hope that before long they will be able to jn-esent a Report 

 to us describing in detail the work carried out. The Report of the 

 Committee itself is shortly to be published, and it will probably be 

 one of the most remarkable documents in regard both to scope and 

 matter that has been issued by a Government Department during 

 those troublous times. 



The work done, although not immediately made use of for War 

 jHirposes, as the Armistice rendered any help needless in this quarter, 

 will, without doubt, bear great fruit in the future ; in fact, the Nitrogen 

 Factory, which was being started during the War, has already been 

 taken over by a private organisation. It is therefore probable that 

 the Nitric Acid required in this Country for making explosives, dyes 

 and drugs will be produced synthetically in this manner. 



Sijinposia jjreviously held. — Since the formation of the Faraday 

 Society, we have had approximately 330 papers presented to us, most 

 of them fully discussed. During my own term of office — 1914 to I9I9 

 — some 180 papers have been read, and, including the present one, 

 there have been fifteen Symposia held, attended by considerably 

 over 3,'XO Members and Visitors. The following shows these in 

 tabular form : — 



Title. 



The Hardening of Metals. 



The Transformations of Pure Iron. 



The Corrosion of Metals. 



Methods and Appliances for the Attainmeiif of 

 High Temperatures in the Laboratory. 



Refractory Materials. 



The Training and Work of the Chemical Engineer. 



Osmotic Pressure. 



Pyroineters and Pyrometry. 



The Setting of Cements ami Plasteis. 



lOlectric Furnaces. (Synq)osium at Manchester.) 



The (V)-()rdination of Scientific Publication. 



The Occlusion of Gases by Metals. 



The Present Position of the Theory of lonisation. 



Radiometallogr.iphy. 



