762 EEPORT— 1898. 



at least for the mouths of January and July, the difi'erences dX., dY, dZ of the 

 hourly means from the preceding means.' 



In lieu of this the Committee adopted the following resolution: — 'It is 

 desirable to publish the monthly means of the Geographical Components of the 

 Magnetic Force for each month, and also the differences between the hourly means 

 for each month and the monthly means for that month.' 



(3) The resolution proposed by General RykatchefF (Report, p. 32) : — ' It is 

 desirable for the progress in Terrestrial Magnetism that temporary observatories 

 should be installed in certain localities, especially in tropical countries.' 



On this subject a Report was prepared, at the request of the President, by 

 Professor von Bezold and General Rykatcheff. For the Report, and the reso- 

 lution passed by the Committee, see p. 743. 



The Committee were informed by Dr. C. Schott that it was the intention of the 

 Coast and Geodetic Survey of the United States to establish a magnetic obser- 

 vatory at Honolulu. 



In the course of the discussion on the above resolution, the Committee also 

 resolved : — 3a. ' That it is desirable to point out that observatories at great dis- 

 tances from others should be provided with both absolute and self-registering 

 variation instruments.' 



(4) The question as to the relative advantages of long and short magnets, raised 

 by M. Mascart at the Paris Conference (Report, p. 39). For the Report, and the 

 resolution passed by the Committee, see p. 741. 



B. Resolutions passed by the Committee on matters arising during the Inter- 

 national Conference. 



(1) Professor Eschenhagen made a statement to the Conference as to his recent 

 investigations on minute disturbances made by very sensitive apparatus with a 

 very open time scale. 



In view of this statement, the Committee expressed their sense of the impor- 

 tance of the resolutions on this subject passed by the Paris Conference (Report, 

 p. 35) and the hope that the principal observatories would carry out simultaneous 

 observations of the character proposed. 



M. Moureaux informed the Committee that preparations for such observations 

 were already complete in the observatory at Pare St. Maur. 



The Committee took note of the statement that Professor Eschenhagen would 

 be willing to give information as to the construction of the instruments used by 

 him. 



(2) The Committee also passed the following resolution : — ' The Committee is 

 of opinion that the early establishment of a magnetic observatory at the Cape of 

 Good Hope provided with absolute and self-registering variation instruments 

 would be of the highest utility to the science of Terrestrial Magnetism, especially 

 in view of the Antarctic expeditions which are about to leave Europe, and that 

 the observatory should be established at such a distance from electric railways and 

 tramways as to avoid all possibility of disturbance from them.' 



Directions were given that the proper steps should be taken to obtain the 

 approval of the British Association for this resolution, with the request that, if 

 approved, it should be forwarded to the Colonial Government. 



(3) On the motion of Professor Adolph Schmidt, the Committee resolved : — 

 ' That it is desirable that magnetic observations taken in regions not included in a 

 magnetic survey should be repeated from time to time, care being taken to secure 

 the identity of the point of observation.' 



(4) Professor Eschenhagen was requested to draw up a detailed scheme for 

 the exchange between the various observatories of the curves of the self-registering 

 variation instruments taken during important magnetic storms, and to lay the 

 scheme before the next meeting of the Conference. 



(5) With reference to certain inquiries which Professor Eschenhagen suggested 



