230 Scientific Intelligence. 
the occasion of receiving from the Governor of the Province of 
Cordoba the premiums awarded at the Philadelphia Centennial 
Exhibition to the Observatory for Lunar and Stellar Photographs, 
e 
ours, and will probably long continue to claim the ; 
Much of the credit of the stellar photographs is due to the 
pure air of Cordoba, which is incredibly transparent on those not 
very numerous occasions when the sky is truly clear. The 
impressions on glass which I exhibited were of six different 
am as 
unprepared to state. Since it is important that all the images 
should be opiate round, without the slightest perceptible elon- 
Say and si ; i 
as 
e have already secured measurable photographic impressions 
objects, of which ninetee 
the undertaking remain paralyzed in its resent state, the results 
may be regarded as richly worth the labo 
the planets Jupiter, Mars and Saturn have awe been photo- 
graphed with sufficient distinctness to show clearly the details 
of light and color on the surfaces of the two former, and the 
