10 
GREENLAND VOYAGE. 
In an eight-day chronometer, by Har¬ 
getts, there was also a sensible effect produced 
by an alteration of position. But the most ex¬ 
traordinary result was with an eight-day chro¬ 
nometer by Litherland and Davies. When 
the position was kept uniform, the rate of this 
instrument was very fair ; but, on shifting it from 
NE. to SW., it was retarded 4". 4 daily. On re¬ 
storing it to its first position, it was again acce¬ 
lerated even beyond its former rate. The same 
change was repeatedly made; and, in all cases, 
an alteration of from 4".4 to 9 '. 5 per day oc¬ 
curred ; and, in every instance when the change 
was made from NE. to SW., the rate was re¬ 
tarded ; when the contrary way, accelerated! Be¬ 
tween the positions of SE. and NW., there was 
also a difference of rate, but it was not very con¬ 
siderable. 
As the experiments with the last instrument 
were by far the most decisive, 1 was desirous of 
examining the balance,—a wish that Mr Davies 
very readily gratified. It was found to be strong¬ 
ly magnetic, acting with great energy on a small 
needle, at the distance of more than an inch. 
The balance of another chronometer by the same 
makers, whose rate in all positions was remark¬ 
ably uniform, was also examined, and it was sa¬ 
tisfactory to find that it was entirely free from 
magnetism. 
