60 SUMMARY 
rather than according to Greenwich meridian time. 
3. Carry surplus equipment in stock wherever elec- 
trical recording apparatus is used. 
4. Plan to carry out frequent checks of the recording 
instruments and obtain periodic psychrometric observa- 
tions at several heights above the deck of the vessel. 
5. Mount several Robinson Cup or Dines anemome- 
ters at similar heights above the deck for the purpose of 
obtaining wind records to correspond to temperature and 
humidity measurements. 
6. Make periodic observations of cloud types and 
amounts, and estimates of their direction of movement 
and altitude. 
7. Undertake a systematic program of precipitation 
measurement, preferably with recording equipment. 
8. Obtain continuous records of solar and sky radia- 
tion. 
9. Undertake periodic ascents into the upper atmos- 
phere by means of radio meteorograph equipment. 
10. Make periodic counts of dust particles and con- 
densation nuclei in the atmosphere, and determinations 
of the CO2 content of the air. 
11. Continue investigations of wind velocities and di- 
rections at different heights above the sea surface 
through balloon drifts and cloud motions. 
12. Continue evaporation studies at sea with a view 
toward improving methods and equipment. 
It is to be remarked that such a program as outlined 
above, in addition to the regular program of observations 
of atmospheric pressure, sea-surface temperature, state 
of the weather and sea, and optical phenomena, would 
require the constant attention of several full-time ob- 
servers. It thus appears that such a program could best 
be done on a vessel which was primarily equipped for 
meteorological work, and which would conduct intensive 
surveys of small areas. 
Extensive meteorological and climatological studies 
could be conducted, as previously, in conjunction with 
oceanographic or other scientific investigations made 
over wide areas of the ocean surface. 
