INTRODUCTION 
The meteorological data which are discussed here 
comprise the ordinary meteorological observations tak- 
en on board the nonmagnetic ship Carnegie during its 
seventh cruise (1928-1929). The Carnegie had become 
well known to scientists throughout the world for its 
magnetic surveys of all oceans during cix previous 
cruises from 1909 to1921. Before embarking on the 
seventh cruise, however, the vessel was refitted and 
equipped for special oceanographic and meteorological 
work, as well as for magnetic and atmospheric-electric 
observations. The ship was primarily a sailing vessel 
(600 tons) with hermaphrodite brigantine rig, but also 
had an auxiliary motor capable oi developing 6 knots. 
The crew consisted of seventeen men; the scientific 
‘staff, including Captain J. P. Ault, numbered eight, two 
of whom, Dr. J. H. Paul and Oscar W. Torreson, handled 
the meteorological work as part of their duties. 
The route covered by the Carnegie and the uncom- 
pleted parts of the cruise are shown in figure 1. It was 
originally intended that the cruise should occupy the 
greater part of three years (from May 10, 1928, through 
1931), but this program was abruptly halted when the 
vessel caught fire and burned while anchored at Apia, 
Western Samoa, November 29, 1929. 
Complete meteorological observations and records 
of sea-surface temperature and of the state of the sea 
were made each day at noon (GMT), the data being en- 
tered on forms supplied by the U. S. Weather Bureau. 
One copy of these forms was forwarded to the Weather 
Bureau and another was retained on the Carnegie. The 
complete series of these noon observations is given in 
tabular form as appendix II of this report (table 76). 
In addition to the observational work outlined above, 
the meteorological program of the Carnegie called for 
continuous recording of atmospheric pressure, sea-sur- 
face temperature, and wet- and dry-bulb temperatures 
on deck and at two levels above the deck, and for period- 
ic measurements of evaporation and the determination of 
upper-air winds by means of pilot balloons. Also, at 
each watch the ship’s officer entered.a record of prevail- 
ing and special weather conditions in the log; most un- 
fortunately, the original logbook was destroyed with the 
Carnegie. Abstracts of the log had been prepared and 
mailed to the Department of Terrestrial Magnetism, 
Washington, D. C., each time the Carnegie touched port. 
This abstract has been extremely useful in determining 
average weather conditions for certain days of the cruise 
and for locating positions. The abstract is included in 
this report as appendix I. 
In order to facilitate regional studies of the Carnegie 
data, the route covered by the cruise has been divided 
into twenty-two parts, which have been chosen on the ba- 
Table 1. Groups used in compilation and discussion of meteorological data, Carnegie, 1928-29 
F a No. Mean 
ro 
2 1928 2 2, 
I South Greenland July 29-Aug. 6 9 56.3 N 40.7 W 
U Southeast Newfoundland Aug. 7-10 4 42.8N 47.8 W 
Ul Southwest Azores Aug. 11-23 13 29.0 N 42.0 W 
IV Northeast Venezuela Aug. 24-Sep.16 24 11.8N 43.0 W 
Vv Caribbean Oct. 2-10 9 13.8 N 71.0 W 
ava) Gulf of Panama Oct. 26-Nov. 6 12 4.0N 81.0 W 
VII Galapagos 
(a) Easter Island Nov. 7-Dec. 21 at 16.5 104.3 W 
1929 9 
(b) Easter Island Feb. 18-28 11 IBS 119.4 W 
1928 
Vill Southwest Juan Fernandez Dec ae 31 10 37.28 96.7 W 
1929 
Ix Chile Jan. 1-14 14 24.78 83.3 W 
x West Callao Feb. 6-17 12 12.38 88.2 W 
XI Tuamotu Mar. 1-31 24 16.88 147.9 W 
Xi Marianas 
Phoenix Island Apr. 22-May 31 35 oN 168.7 E 
xin Japan 
(a) June 1-30 ig 34.3 N 143.1 E 
(b) July 1-3 3 fit 39.6 N 149.4 E 
XIV Alaskan Peninsula July 4-21) 19 47.7N 179.5 W 
XV Northwest America July 22-28 7 41.5 N 131.8 W 
XVI California Sep. 4-8 5 34.1 N 126.3 W 
XVII Hawaii 
(a) Sep. 9-16 8 27.8 N 136.6 W 
b Sep. 17-Oct. 7 12 938 27.0 N 155.1 W 
(c) Oct. 8-25 18, 25.2. N 140.7 W 
XVI Christmas Island Oct. 26-Nov. 18 24 0.1S 150.5 W 
Totalidays! scasascmesesccsenee 325 
4 Days omitted as follows: Dec. 6-12, 25 in 1928: Mar. 13-20, May 6, 21-24, June 8-23, Sep. 
23-Oct. 1 in 1929. 
b Including two dates July 14 on crossing 180° meridian. 
