74 Scientific Intelligence. 
Cape Comorin were occupied for a few months only in 1858 and 
1859. 
both from the climate and the native assistants, one res us 
wonder that he has ea so much, He certainly would 
not have been able to have accomplished what a: has done had 
not his previous a at the "Ma kerstoun a ieee 
him in good stead. 
4, ek Sopra of weights to be given to de Senietrcesi for 
determining time with portable transit instruments, recorded 
the chronograph ie method ; by Cuarues A. ScHort. pe 
, U. 8. Coast Survey Report for 1872.—In this little pamphlet 
Mr. Schott. collects together the results of the general experience 
of the telegraph longitude parties of the Coast Survey for a num- 
ber of years. He states: that the introduction of the chrono- 
grapher registration of transit of stars has considerably increased 
their precision, rendering it desirable to discuss the relative 
weights of the equations of condition. In the Coast Survey 
practice, two classes of portable instruments are employed for 
longitude purposes, the largest size having reticules of 25 
threads, the smaller size having glass diaphragms of 15 lines. It 
appears from the probable errors deduced in Mr. Schott’s ser 
that for the larger jnatatienie the gain in accuracy, between 17 
quent change in his personal er rors; a dia aphragm of 17 threads is 
recommended, which may be conveniently disposed in three tallies. 
e probable error of a transit over a single thread is found to be 
for large a — +/ (60°063)?+-(0°036)? tan? 0. 
for small +/+ (0-080)? + (0°063)?tan?0. 
In a reduction of the observations made during any one night 
for longitude purposes, it is recommended not to assume a con- 
i d 
and after each reversal. The criterion for the correctness of the 
entire work is found in the equality of the clock corrections as 
PaeEres to the same moment of time. S. 
the Meteorite of Laneé; by Dr. K. von Drascus; 
ete Mineralogische Mitthetiuagen, 1875,—This meteorite 
careful microscopic alan, 
