600 



SCIEJS'GE. 



[Vol. IX., No. 228 



and Norwegians, and no one can blame them if they 

 desire their children to be educated in a way that 

 they can appreciate it ; and, if the Americans can not 

 and will not do it, tlaey will and must do it. As a 

 rule, they are not opposed but glad to have their 

 youth learn English ; but they also wish them to 

 know something more, especially the language, litera- 

 ture, and history of the fatherland. The complaint 

 made against them often comes from denominational 

 headquarters, because they cannot proselyte them 

 fast enough. The Scandinavians are Lutherans, and 

 they will resist any and every attempt that is made 

 to rob them of the faith for which Gustavus Adolphus 



markably well, evidence of which I have recently 

 had, in which I have used a large battery of Leyden 

 jars as a source of electricity. 



The instrument measures between four hundred 

 and ten thousand volts, and is exceedingly useful in 

 connection with the Holtz machine and other high- 

 tension sources. F. E. Niphee. 



St. Louis, June 3. 



The report recently issued by the geological 

 survey of Kentucky, on the geology of Elliott 

 county, discusses the coal-measures of that region, 

 and especially the massive conglomerate, which, 



THOMSON'S ELECTKOSTATIC VOLTMETER. 



(Eeproduoed by permission of James W. Queen & Co.) 



fought and died. Allow them the religious liberty 

 of which we boast as Americans, and they will be 

 Americans too. J. P. Uhlee. 



St. Peter, Minn., June 2. 



Thomson's electrostatic voltmeter. 



Respecting your inquiry as to the merits of the 

 Thomson electrostatic voltmeter, I must say that I 

 have made great use of it during the last year, and 

 am very much pleased with its performance. It has 

 the disadvantage of not being very portable, and I 

 fear that the wood of which the enclosing box is 

 formed will go the way of all European woods in our 

 climate. I begin to see evidence of warping now, 

 which will make it necessary to re-examine the scale 

 of the instrument. 



The instrument will, however, hold its charge re- 



along certain uplifts, has been deeply trenched by 

 the streams, the vertical walls of the narrow and 

 exceedingly picturesque gorges ranging from 75 

 to 175 feet in height. We also find here full ac- 

 counts by Messrs. Crandall and Diiler of the trap 

 dike of Elliott county, which is noteworthy as be- 

 ing the only mass of eruptive rock yet discovered 

 in Kentucky, and of the ' interesting possibilities ' 

 in the way of diamonds suggested by Professor 

 Lewis. But, although this peridotite is similar to 

 that so closely associated with the diamonds in 

 South Africa, Mr. Diiler finds no facts which 

 would warrant a persistent search for the gems in 

 Kentucky. 



