ZOOLOGY AND BOTANY, MICROSCOPE, KTC. 



315 



ment is designed on lines at once simple and strong. While the present 

 arrangement includes only such parts as are strictly necessary for the 

 performance of the simpler goniometric measurements, yet the construc- 

 tion is such that verniers of greater sensitiveness and telescopes of 

 greater magnifying power could well be used, and such indeed could be 



provided if called for. The verniers of the telescope move in the plane 

 of the main divided circle which is fixed to the base, and w'hich is 8 in. 

 in diameter. A smaller divided circle and verniers are provided for 

 the table. 



The telescope axis appears to be longer than is usual in the majority 



