Observations of the Unued States Signal Service. 13 
low pressure which was advancing from the west. January 9th 
the low area was nearly stationary (bar. 28°7), with a high on 
the east much reduced (har. 30°3) and an equal high on the 
west. January 10th low stationary (bar. 28-7) with a high on 
the east (bar. 30°5), with a small low on the west (bar. 29:5) 
and a high further west (bar. 30°6). January 11th the two 
low areas coalesced and the resulting center of least pressure 
was thereby carried 650 miles westward (bar. 28°), with a 
high on the east (bar. 30°7) and a high on the west (bar. 30-4). 
In this case there was a subordinate low center (bar. 29°3) 
about 2,000 miles in a northeast direction, which has the 
epression, and the area of low pressure (below 30 inches) 
stretched entirely across the Atlantic Ocean, including the 
whole of Newfoundland on the west and the whole of Great 
Britain on the east, extending southward to latitude 32° and 
northward beyond latitude 70°. Plate II represents the isobars 
for January 12th and also the path of the storm’s center from 
December 30th to January 18th. January 13th the center 
was nearly stationary, January 14th it had moved a little east- 
ward, January 15th it had moved a little northward, and dur- 
ing the three following days it moved a little eastward. Thus 
on January 18th the center of the storm was only 900 miles 
eastward of its position on December 30th, and it was 200 
miles westward of its position January 3d. The principal 
westerly motion of the storm center appeared to result from the 
influence of another low center advancing from the west and 
uniting with the former. This result took place January 4th 
center, attended by extensive precipitation, which on the 
western side consisted chiefly of snow and sleet, with very low 
temperature, the thermometer on the American coast remain- 
ing much of the time near zero of Fahrenheit, and at stations 
but little removed from the coast sinking more than 20° below 
zero. This precipitation is believed to have taken place chiefly 
er the ocean, where its amount could not be measured. The 
following table shows the precipitation in Newfoundland, New 
Brunswick and its vicinity, and also shows the lowest tempera- 
