412 PHYSICO-TECHNICAL INSTITUTION IN OHARLOTTENBURG. 



Veritifation of swingle resistances, 123 samples. 



Calil)ration of 83 resistance boxes, conii>ensation apparatus, etc., containing 1,153 

 single resistances. 



Comparison and verification of 133 standard cells — 111 Clark and 22 Weston ele- 

 ments. 



Determination of the ratio Clark 15° C. to cadmium 20° C, and Clark 0° C'. to cad- 

 mium 20° C, with a large number of standard cells. 



Examination of 21 samples of dry and storage cells. 



Calil)ration of 15 galvanometers to mea,«ure high and low temperatures with thermal 

 elements. 



Magnetic examination of 25 samples of iron and steel. 



Investigation of the difference between the continuous and the discontinuous mag- 

 netization of steel. 



Investigation of the influence of repeated heating on the magnetic hardness of iron. 



III. WorJc relatliu] to heal and measurement of pressure. — Calibration of 18,777 tlier- 

 mometers. 



Kxamination of 4 safety appliances and 1)enzine lamps. 



Calibration of 317 thermal elements. 



Verification of 9 manometers and 22 barometers. 



Testing of 190 samples of apparatus for petroleum investigations. 



Testing of 3,210 samples of safety rings and plugs. 



Testing of 22 samples of indicator springs. 



IV. Work in light. — Testing of 149 Hefner lamps for photometric purposes. 

 Testing of 189 incandescent lamps. 



Testing of 143 gas and other lamps and adjunct appliances. 



Investigation of the relation between the temj>erature of sugar s(jlutions and their 

 rotatory power on polarized light. 



Investigation of quartz |)lates for the examination of sugars. 



ncteniiination of 100 j)oints in the normal Ventzke scale for sodium light. 



Kspecially careful collection (jf sugars from (iermany, Austria, France, Russia, 

 and North America for the investigation of specific rotatory power. 



^^ ]Vork In rhemlKtrj/. — Continuation of the study of the solubility of important salts. 



?jlectrolyMis of platinic chloride ami the migration of the ions. 



Tlu' ([uantatitive detennination of metallic j)latinum. 



Investigation of liquids for use in thermometers to measure low temperatures. 



In addition to the above work attention is drawn to the fact that there 

 ;uv two institution.'"; for caliljration and certitication of thermometers 

 under the control of the lieichsanstalt, one at Ihnenau and the other at 

 Gehlbero-. During the last ten years the institution at Ilmenau has 

 tested in round numbers 350,000 thermometers. 



The number of persons employed in the Keichsanstalt the past year 

 was 87. 



V. A LESSON FOR US. 



If German}^ has found it to her scientific and industrial advantage 

 to maintain the Reichsanstalt, and is proud of what it accomplishes, 

 and if Great Britain is so impressed with the success of the institu- 

 tion that she has decided to imitate it, it is surely the part of wisdom 

 for the United States to move in the same direction. It is therefore 

 very gratifying that at the suggestion of Secretary Gage a bill was 



