94 
proposes now to strike off and bind up the catalogue by it- 
self, on account of its special utility to astronomers. 
Equal, if indeed not superior in value to these are the 
Zones, comprising more than 33,000 observations of about 
23,000 stars within 241° of the South Pole. These comprise 
stars to the ténth magnitude inclusive, more than five sixths 
of which, or about 20,000 had not before been observed. 
These will constitute the Fifth Volume, which will contain 
about 1,200 quarto pages. The reduction of the declinations 
has already been essentially completed, and Admiral Davis, 
under whose charge the work is now placed, estimates that 
two years’ more labor, with the present force, will prepare it 
for the press. I need not say with what satisfaction the 
publication will be welcomed by astronomers throughout the 
world. 
An unforseen and peculiar obstacle was encountered in 
the large azimuthal motion of the hill of Santa Lucia, which 
seemed to undergo a certain amount of rotation, alternating 
in direction as the scorching rays of the sun by day, or the 
frigid emanations of the near Andes by night, alternately 
exerted their maximum effect. This phenomenon seems to 
_ have been not only greater in degree, but entirely different 
in some respects from that other analogous phenomenon of 
diurnal azimuthal fluctuation, which there is now reason to 
believe very general, and of which I have spoken on other 
oceasions. Add to this the vnicteai lie of which he recorded 
one. hundred and twenty-four observations during the three 
years of his sojourn in Santiago, and which inevitably de- 
atroyed or changed the adjustments of the instruments, the 
+ asions, 
esis temporary 
and the exhausting nature of the observations, continued with 
t peeing: assiduity ty through seasons at once so cloudless 
ervating, and you acme some estimate of the 
