waa Libel cote Ses ilgh portion of and 1s found in z le of the islet ao ith gand, | This Portulaca (P. oleracea and P. samoensis) form the ground cover, Boerhaavia 1s the principal ground cover under Pisonila and Cordia. or a THE OBSERVATIONS 7. the plan Four aspects of the observational program require consideration: 8 maximum r part of the of observation, instrumentation, instrument exposure (including site details), >Overed with and observational procedures. ! a definite study most useful it is necessary to estimate how reliable the different kinds © argins. of observations were. In In addition to make the data collected in this all of these aspects Except for the observational plan, && and Fleurya of the observations are considered specifically in the detailed notes that ur as isolated accompany the Tables in Appendix I. islet. Plan of Observation: The intensive observational periods extended from 1200 August 18th through 1100, September lst, 1957 and from 1200 January 25th lL sand rock > the tslet 7 through 1100, February 8th, 1958 (180th meridian time). she islet, ' ig summarized in Table II. - Short per. | | 4 the low ) This plan was, in fact, with three principal exceptions: be described, The plan of observation followed reasonably closely because of various difficulties that will not there were days on which cloud photographs were not obtained and hest portion on which radarscope pictures were not obtained; and hygrothermograph records shrub. were not obtained for every day at all locations. The ib Pemphig, A In addition, a few of the 3-hourly observations were missed at KEITH and BRUCE, while at the northern -xcept for a islet sites (YVONNE and JANET) a few daily rainfall observations were missed. l to coconuts, The tabular data in Appendix I show precisely what these various omissions were. 41 or gang most no becomes During the actual intensive observational periods, special traverses were f made on BRUCE and KEITH to determine micro-scale variations in the dry- and i wet-bulb temperatures and in the temperature of the ocean and lagoon water at 00m side of shallow depths upon the reef. ver in the mental observational data may prove of interest to some investigators. forms a 7 Despite their relative paucity, these supple- The extensive observational phase covered two perlods: from September 1, 1957 through January 24, 1958 and from February 9, 1958 through August 17, 1958. ast of the = Throughout almost all of this period semi-monthly rainfall totals were obtained n side near at BRUCE and KEITH and daily totals were obtained at FRED and ELMER. h is no addition, some additional rainfall readings were made on YVONNE, JANET, and MACK, Ln the open, + and Organization of Observational Data: In The bulk of the observational data are presented in the Tables of Appendix I, which contain s its own Table of Contents, 19 RE en eee