356 Letter of Dr. B. A. Gould. 
His observations were made with much precision, and afford 
admirable determinations of the longitude of the cities of Rio 
Cuarto and Mendoza. Similar observations made at San Luis 
prove to beaffected by errors of record, which preclude satisfac- 
tory results; but any future observations capable of giving re- 
sults of sufficient approximation to indicate the errors which 
exist, will make these data available also. I had hoped to 
have obtained before this time the means of determining the 
before many months to carry out this plan. i 
The longitudes thus far determined are :—In connection with 
Sr. Moneta, Chief of the National Engineers, by transit obser- 
vations and exchange of signals on several nights— 
Rosario, . 0" 14™ 145 484-0%-02 (latitude, 32° 56’ 41'"7) 
Buenos Aires, E. 0 23 18°88+0°03 “ 34 36 21° 
By solar observations made by Mr. Davis with reflecting circle— 
Rio Cuarto, W. 0" 30" (lat. 33° 7’ 19"). 
Mendoza, W. 0" 18" 306 (lat. 32° 53/ 6”). 
The photographic work went on with all the success that we 
had any right to expect with the broken lens. Dr. Sellack sue- 
ceeded in obtaining impressions of some twenty Southern: clus- 
ters, among them one of the 7 Argus cluster with 57 stars, and 
one of the magnificent cluster near y Carina with 122 stars. 
But the fracture seems to have been fatal in one respect, for none 
of the stars on these plates give a trail, so that the zero of I 
tion is not determined with the sharpness desirable. Finally, 
decided to bespeak another object-glass of Mr. Fitz on my aad 
account, and in October sent him the order. The Nationa 
Government, with the liberality which it has never failed to man: 
fest on every fitting occasion, soon afterward authorized | 
chase of the lens for the Observatory, and gave to Dr. Sellac aa 
appointment from the beginning of the year, as professor 1D : : 
scientific faculty now organizing in this University, with sie 
tions to continue the photographie work at the Observatory dee 
the present. The new lens has now arrived in perfect © ne 
r. Fitz gives very encouraging accounts of its sir i 
and a very few days ought to see the work resumed anew Me to 
better auspices for success. Before long I hope to be able 
give you good accounts of the results obtained. 
Cordoba Meteorological Bureau. ished 
The meteorological bureau, of which I wrote, was eatablts nD 
by the National Congress soon afterward, and is already ~s 
ized. A liberal sum was placed at my disposition for the P 
