704 



SCIENCE. 



[N. S. Vol. XII. No. 306. 



Perhaps the best indication of the valu- 

 able work of the Reichsanstalt is to be 



lished in the ' Zeitschrift fiir Instrumenten- 

 kunde,' and the reprint for 1899 forms 



u 



found in the annual ' Thatigkeitsbericht. ' 

 This report of the year's activity is pub- 



a pamphlet of twenty-five large, closely 

 printed pages. The following abstract will 



