Letter Jrom B. A. Gould. 475 
The green portion seemed to have variable limits and to be 
disproportionstely bright, but no green bands were seen. In 
my note book I have marked (a) (b) and (c) “sure of.” 
U. % ae Acad., West Point, N. Y., Oct. 9, 1872. 
Letter r Ale Dr. 3B. Goutp, Director of the ge tte at 
Cordoba, to the “Dilitors dated Cordoba, Sept. 4, 1872. 
Searcely a mail has gone out homeward for many months with- 
out we having experienced a-strong desire to tel 
repeat ‘the old wie of obstacles and delays; for, ‘although we 
have all worked to the utmost of our power, this interval has 
served to show how erroneous were my estimates of what could 
be accomplished within a given interval, in a ape country = at 
a distance from those facilities to which we are so thor ghly 
accustomed at home that it is difficult to feel how idisoeeenhie 
they are, or to make allowance for their entire absence. nd 
while anxious to fulfill my promise of writing to you, I was unwill- 
ing to send tidings unacco mpanied wd accounts of something done 
toward the fulfillment of my origin oh rane 
devoted to soe research in this clear and trans spare 
can now commence. an era of full activity, I shall not feel that 
these years of toil in the joint capacity of architect, surveyor, 
Sie ot engineer and mechanician, as well as astronomer, 
have _— 
ted Mprighnyesay. which have till now 
wien’ unex 
delayed the bom ae of the e observ rvations, have not 
interfered with the Uranometry, whic has advanced as uninter- 
identified from the hora pe and their 
mean, — x of 1872°0; _ or for those ew whieh could not be 
rat 
a in the belt between 5° and 15° of N. declination 
and expa tenths of a magnitude, For stars Ww 1. 
ie Roan. we had no trustworthy basis; -~ ogee a Ages 
arge proportion of our stars were noted as gree and 
many even fainter than 7 by Lalande, Tey | pa risbane, 7 was 
