EXl'EniMENTS 0\ LIGHTS. 67 



probably an untruth. Must I not endeavor to sati&fy myself of the fact 

 in the first instance ? Now this gentleman could not tell me the divi- 

 sions of the discourse, nor even the text. In a common citizen 1 could 

 excuse this, but in a theological student, and upon such an occasion, 

 it is enough to convince me that he was not present, especially when i 

 have in my possession the untouched wafers that prove how many of 

 the subscribers did not commune." I scarcely knew what to reply. 

 So they then actually have to drive theological students to the altar in 

 Germany ! And do theological students lie about this sacred ordinance 

 in so shameless a manner ? Yet this is the testimony of the Universi- 

 t'ats Prediger himself, and under circumstances where the whole truth is 

 drawn out. I was grieved to the heart, and could only say to the Pro- 

 fessor: that I thanked God such things were unheard of in my native 

 land. 1 told him that among us piety was, among all evangelical deno- 

 minations, regarded as the first and most essential requisite in a theolo- 

 gical student, and that where this was found all such ecclesiastical police 

 regulations were unnecessary. 



May God have mercy on our church in Germany ! 



EXPERIMENTS ON LIGHTS. 



Mr. Editor: 



As a number of compositions have been recently brouglit into use 

 professedly superior to the ordinary materials foi producing light, I 

 concluded to test the relative economy of several preparations which 1 

 suppose to be analogous to those offered for sale, and as the results may 

 be of some value I place them in your hands. 



Chemistry makes known to us but few substances which from their 

 cheapness and illuminating power can be used for the preparation of 

 lights. Among these alcohol, camphor, turpentine, rosin, tallow, lard, 

 ■wax and oil are almost the only ones that are adapted to this purpose. 

 Pine oil, caraphine, &.c. have not been included in the list as tlicy 

 doubtless consist essentially of oil of turpentine. 



The experiments were commenced by graduating a test-tube so that 

 each division represented tenths and hundredths of air avoirdupois ounce 

 of water, and obtaining the specific gravities of the fluids employed in 

 a manner sufliciently accurate to give the relative weights. It was found 

 that 



1 Gallon of turpentine weighed 7.25 lbs. specific gravity .869 

 1 " alcohol '• 7.17 lbs. " « .859 



1 '• water - S.34 lbs. '• '• 1.000 



