252 Hassler’s Repeating Theodolite. 
from the accident, has, with every other symptom of disease, 
wholly disappeared. 
Allow me to acknowledge my obligations, for the re- 
spectful sentiments, you have done me the honor to express, 
in AYOUF last iis Ana:G on for rmer occasions ; which, in truth, 
camaane man, a monume ent imperishal 
am, dear Sir, truly and meepeetey yours, 
u E. Muse. 
Art. VIl._—Hassler’s Repeating Theodolite. 
Notice of this instrument, in a letter to the Editor, dated New York, May8, 1829. 
.. Sir—Permit me to make known, through your useful Jour- 
nal, an improved repeatin a = Mr. Hassler, who 
is so well known both in untry and in Europe, for his 
improvements on repeating aid fetlectig Sirol and theo- 
dolites. This instrument has just been constructed, for the 
first time, by Mr. Richard Patten, instrument maker of this 
city, for the exploring expedition, and will be found on exam- 
ination as near perfection in principle, as it is possible to arrive 
at ; compensating not only the faults of workmanship, but the 
errors of observation. Its adjustments are those of the re- 
peating circle and eect so well and fully described by 
the inventor, in his paper “aed coast survey. An inspec- 
fittle fob and makin. king the atroent’ suscept tible of any 
number of repetitions. I should be doing great injustice to 
* Alluding to the letter to which this is an answer: I sh pest have 
been willing to allow the above paragraph, (of certainly too = mane 
— to'remain, had it not been for the present posture of afar’, ¢ as regards 
he prosperity of this Jou etal 
