Appendix. 77 
AP PEN DIX: 
Letter to the Editors from Dr. B. A. Goutp, Director of the 
— “ ba Observatory, dated Cordoba, April 26, 1871. 
even now as I write, the portion of the building ign was first ee Adel is 
not finished. sithongh a very few days will enable in all pro bability to 
begin the mounting of the instruments. So far as ‘elays ey: caged arate ns of 
every sort are concerned, the enterprise has met wit ery exceptional 
amount of obstacles, and ov three days ago so laaksienenta arrived from 
sety after ten months of delay from war, ice, storms and quaran het. 
m s 
tron-bound boxes. Should no iinexoecied soatcls es arise, we shall be able 
'o put up some bookcases, and unpack the boxes within eek, 
been s 
As Sara ge age former letter, I baste as soon as the delays ee 
est, to turn our attention to the formation of a Uranometry of the South- 
em sky :—in other hg to - eget aie of a oar gia of all stars ga 
Pole 
Ke T have not yet undertaken to determine ; but we det stg one-third of all 
recorded by Lacaille as of the 7th iageitude, a and we have a dozen 
°T more of cases where Lalande has aed the star 
2 are ma 3 sceed b 
tween 5° and 15° of N. pg since this zone has the same meridian 
altitude at Cordoba and at Bonn, and the light of me included stars is thus 
Similarly affected by atmospheric absorption 
The establishment of standards of magnitude within this belt has been by 
«Means the least laborious and troublesome portion of the | 1s i gs 
“4 Be a sede an excellent measure of the transparency of the sky of 
