54 SEC. 3. - MEASUREMENT, 



This normal 2-meter standard is an end measure, as well as a line 

 measure, with divisions throughout in centimeters, and on both the end deci- 

 meters in millimeters. It was graduated on the longitudinal dividing machine, 

 constructed by George Breithaupt in the year 1850, for the temperature of 

 Celsius, as far as 0-01 mm. precision. 



Such normal double meters have been made in large numbers on steel, as 

 well as simple normal meters on brass, for the Imperial Commission of Normal 

 Weights and Measures. 



.With, this longitudinal dividing machine a length of one meter may be 

 graduated uninterruptedly even to the smallest subdivisions. 



296. Star dard Scales in Bock Crystal, viz. : 



a. Scale of 10 cm. 



b. Scale of 15 cm. 



c. Scale of 20 cm. 



The scales are cut parallel to the axis of the crystal and are. 

 divided into millimeters ; the first and the last millimeters are. 

 divided into ten parts. The graduation has been carried out by 

 Mr. Brauer in St. Petersburg. 



Hermann Stern, Ober stein, Principality of Birkenfeld. 



299. Meter in Steely line measure divided into millimeters. 



L. Steger, Kiel. 



. a, i:*ji .1 ij;..'j {. ; ;-'< !;- ju-.t'>. ; afi 



301. Apparatus for comparing Standard Measures of 

 Length, by Stollenreuther. 



University of Munich (Prof, von Jolly). 



302. Meter in the form of a ruler with subdivisions. 



M. Meyer, Teacher of Mathematics at the Gymnasium, 

 Halle. 



In order that the subdivisions of the meter should be clearly understood 

 by the scholars, one side of the square has no divisions, that side is of the 

 exact length of a meter ; the second side is divided into decimeters only, the 

 third into centimeters, and the fourth into millimeters. 



303. Schonemann's Measuring Wedge, reading to '01 

 mm. Gewerbe Schule at Halle (Director, Kohlmann). 



304. Schonemann's Measuring Wedge, reading to '01 

 mm. Kleemann, Mechanical Engineer, Halle. 



, , 



3O6. Meter-scale in Brass. 



.,. ;0 - Prof* Baron von Feilitzsch, Greifswald. 



This scale was constructed at the workshops of Messrs. F. W. Breithaupt 

 and Son in Cassel (Province Hesse), and is remarkable for its great accuracy. 



It is divided, on silver-plated brass, into centimeters, and at both ends 

 into millimeters. 



309. Original Meter Scale, iron. One of the forty speci- 

 mens which were delivered to the members of the Meter-Corn- 



