August 18, 1905.] 



SCIENCE. 



217 



will be conducted at stations distributed prac- 

 tically along the entire belt of totality and 

 also at outside stations, nearly every civilized 

 nation participating. 



These observations will afford a splendid 

 opportunity for further testing the result al- 

 ready obtained. All those who are able to 

 cooperate are invited to participate in this 

 important work. 



The scheme of work proposed embraces the 

 following : 



1. Simultaneous magnetic observations of 

 any or all of the elements according to instru- 

 ments at the observer's disposal, every minute 

 from August 29, 22 h., to August 30, 4 h., 

 Greenwich mean, astronomical time. 



[To insure the highest degree of accuracy 

 attainable, the observer should begin work 

 early enough to have everything in complete 

 readiness in proper time. See precautions 

 taken in previous eclipse work as explained in 

 Terrestrial Magnetism, Vol. V., page 146, and 

 Vol. VII., page 16. It is essential, as shown hy 

 past experience, that the same observer maJce 

 the readings throughout the entire intervalJ^ 



2. At magnetic observatories, all necessary 

 precautions should be taken so that the self- 

 recording instruments will be in good opera- 

 tion not only during the proposed interval, 

 but also for some time before and after, and 

 eye readings should be taken in addition 

 wherever it be convenient. 



[7^ is recommended that, in general, the 

 magnetograph he run on the usual speed 

 throughout the interval, and that, if a change 

 in the recording speed he made, every precau- 

 tion possihle he taken to guard against instru- 

 mental changes likely to affect the continuity 

 of the hose line.'] 



3. Atmospheric electricity observations 

 should be made to the extent possible by the 

 observer's equipment and personnel at his dis- 

 posal. 



4. Meteorological observations in accord- 

 ance with the observer's equipment should be 

 made at convenient periods (as short as pos- 

 sible) throughout the interval. It is suggested 

 that, at least, temperatures be read every fifth 

 minute (directly after the magnetic reading 

 for that minute). 



5. Observers in the belt of totality are re- 

 quested to take the magnetic reading every 

 fifteen seconds during the tiine of totality and 

 to read temperatures as frequently as possible. 



6. At those stations where the normal 

 diurnal variation can not be obtained from 

 self-recording instruments, it is desirable to 

 make the necessary observations for this pur- 

 pose on as many days as possible before and 

 after the day of the eclipse, and to extend, 

 if possible, the above interval of observation. 

 In general, those who will have self-recording 

 instruments have decided to run them for at 

 least eight days before and after the day of 

 the eclipse. 



It is hoped that observers will send full 

 reports of their work to me as soon as possible 

 for incorporation in the complete monograph 

 on this subject to be published by the Carnegie 

 Institution of Washington. 



L. A. Bauer. 

 Dept. Teekesteial Magnetism, 

 Caenegie Institution, 

 Washington, D. C, 

 July 15, 1905. 



NOMENCLATURE AT THE VIENNA INTER- 

 NATIONAL BOTANICAL CONGRESS. 



An international botanical congress was 

 held at Vienna, Austria, June 11-18, 1905, 

 under the presidency of Professor Julius 

 Wiesner, of the University of Vienna, and a 

 number of vice-presidents selected from the 

 delegates from various countries. Between 

 five hundred and six hundred persons were 

 in attendance. After addresses of welcome 

 by scientific and governmental Austrian offi- 

 cials, the congress divided into two sections, 

 holding sessions, (1) for the general business 

 of the congress and the reading of scientific 

 papers, and (2) for the discussion of the 

 special subject of botanical nomenclature, 

 which had been arranged in advance on the 

 basis of a vote by members of an international 

 commission, appointed at the botanical con- 

 gress held at Paris in 1900. The procedure 

 had been capitally organized by Professor 

 John Briquet, director of the botanical gar- 

 den of Geneva, and reporter general of the 



