io6 Mr. Scoresby, jun. on the anomaly , &c. 
■which with the varying position of large quantities of iron 
work, composing our whale fishing apparatus, contributed to 
vary this point where no anomaly is supposed to exist, and 
prevented me from ascertaining satisfactorily, at any time, its 
precise situation. I made indeed but very few observations 
with this view, and these I find neither establish nor refute 
the inference. 
12. The anomaly of variation is probably the greatest in 
men of war, and in ships which contain large quantities of iron; 
but it exists in a very considerable degree also in merchant- 
men, where iron forms no part of the cargo, especially in 
high latitudes, where the dip of the needle is great. 
WILLIAM SCORESBY, Jun. 
Whitby, 3d November, 18 18. 
