DEPARTMENT OF TERRESTRIAL MAGNETISM. 293 



The results of the meeting are embodied in the form of 20 resolutions, viz : 



1. In view of the importance of securing world-wide cooperation in terrestrial magnetism 

 and electricity, and remembering the great contributions in these fields by scientists and 

 instrument-makers of countries not yet adherent to the section, hope is expressed that a day 

 will come when collaboration of all countries in the labors of the section will be possible. 



2. That the attention of directors of observatories be called to the importance of assuring 

 themselves that the methods they employ for scale-value determinations of magnetographs 

 are satisfactory, and that a general statement as to the methods be given in all observatory 

 publications. 



3. That in view of the diverse types of instruments in use, and diverse circumstances 

 prevailing at the various stations, it is not advisable at present to recommend the adoption of 

 any particular method of scale-value determination for magnetographs, nor any particular 

 scale-value, nor to specify an opinion as to the best elements to record. 



4. That national committees be requested to designate, if possible, one observatory in 

 their respective countries for international intercomparisons of magnetic instruments, and 

 to secure intercomparisons of magnetic instruments within their own countries at least once 

 within the course of three years. 



5. That the Committee on Magnetic Surveys and Intercomparisons of Magnetic Instru- 

 ments formulate a definite scheme for securing intercomparisons of magnetic instruments 

 between countries, and especially contiguous countries. 



6. That the following are the localities at which additional magnetic observatories are 

 most desirable: Northeast Canada, Northeast Siberia, Bermuda, St. Helena (or French 

 West Africa), Italian North Africa, British South Africa, and Northeast Australia. 



7. That the steps already taken by the New Zealand Government regarding the continua- 

 tion of the Apia Observatory, in Samoa, are highly commended, and it is hoped that the 

 New Zealand Government may find it possible to provide for the continued full activities of 

 the Observatory. 



8. That the continuation by the Argentine Government of the Orcadas Observatory is 

 very much to be desired, in view of the high southerly latitude of the observatory and the 

 opportunities thus afforded for obtaining highly important data. 



9. That every magnetic observatory publish annually the monthly and annual mean 

 values of the magnetic elements observed during the preceding year, for the purpose of the 

 mutual exchange of such results. 



10. That the organizations responsible for the various magnetic services be urged to make 

 prompt publication of their data as completely as circumstances permit. 



11. That the Executive Committee be empowered to constitute the committees recom- 

 mended by the section and to establish such additional committees as may be found neces- 

 sary to put into effect the resolutions passed at the Rome meeting. 



12. That the Executive Committee be authorized to incur the necessary expense for the 

 publication in the most suitable form of the minutes and proceedings of the Rome meeting 

 and of the various reports received, as well as for the issue of any additional publications 

 which may be found desirable and which the available funds may permit. 



13. That a committee be appointed to report on the best methods, instruments, and com- 

 pilations for polar-light observations. 



14. That in order to stimulate research regarding earth-currents, a committee be 

 appointed to consider and report on the best methods and instruments. 



15. That the Executive Committee be empowered to add to its membership or to the 

 membership of the committees. 



16. That it is desirable there should be in every country at least one observatory making 

 systematic atmospheric-electric observations (especially of potential gradient, earth-air 

 currents, conductivity, and number of ions), which are intercomparable amongst themselves 

 and comparable with similar observations m ade in other countries. 



17. That a committee be appointed on observational work in atmospheric electricity, to 

 report on objects, instruments, and methods. 



18. That in all publications concerning ionization, the author should indicate the value 

 which he uses for the unit charge. 



19. That, if funds allow, copies of disturbed magnetic curves continue to be published 

 as at present, even when on a reduced scale, as they supply information at least potentially 

 useful regarding the general features of disturbance. It is recognized, on the other hand, 

 that for detailed examination photographic copies are much preferable, and that some 



