THE MANILA OBSERVATORY 



433 



by the present director, (See " The Reflecting Zenith Telescope," 

 Stormont & Jackson, printers, Washington, D. C, 1893.) For the 

 measurement of photographic plates the ohservator_y possesses two 



AKrUilNOMHAI, OllSKRVATOIlV, MAMI.. 



first-class micrometers, one made hy Saegmnller, of Washington, and 

 the other by the optician Ililger. The micromctric screw of the lat- 

 ter is seven inches long, and is one of the largest yet constructed. 



