290 CARNEGIE INSTITUTION OF WASHINGTON. 



on May 24 to 25 and on June 1 to 2. The weather conditions were 

 such that the Sun was generally visible up to about one-half hour 

 before middle of the eclipse, when the Sun entered a fragment of slow- 

 moving fracto-cumulus cloud. 



Australia. — Messrs. Wallis and Parkinson, in addition to the daily 

 variometer records, also secured a series of absolute declination diurnal- 

 variation observations with magnetometer at the observatory near 

 Watheroo. 



North America. — The work at Washington was limited to absolute 

 diurnal-variation declination observations, in accordance with the 

 program, on three days, May 28, 29, and 30. 



South America. — Complete magnetic and atmospheric-electric obser- 

 vations were obtained by Messrs. Wise and Thomson at Sobral, Brazil. 

 Photographic registration of diurnal variation for declination, hori- 

 zontal intensity, and vertical intensity were secured on the day of the 

 eclipse and also on 6 preceding and 9 succeeding days, together with 

 the necessary control absolute observations and base-line and scale- 

 value determinations. The photographic trace for declination on May 

 29 was imperfect because of the development of fungi on the vario- 

 meter magnet, causing contact with and dragging on the damping- 

 box; fortunately absolute determinations of declination were made 

 with a magnetometer by Mr. Wise at minute intervals over the speci- 

 fied period during the eclipse. The special atmospheric-electric 

 observations were carried out with the conductivity and potential- 

 gradient apparatus supplied. It should be noted that the batteries of 

 silver-chloride dry-cells used for the atmospheric-electric work were 

 found particularly well-suited and suffered practically no deteriora- 

 tion because of the tropical conditions encountered. The weather 

 conditions were favorable for viewing the corona during totality, 

 though clouds had obscured the Sun during most of the first phase of 

 the eclipse. The party is particularly indebted to the Brazilian Gov- 

 ernment for the generous assistance given at Sobral through Dr. H. 

 Morize, Director of the National Observatory at Rio de Janeiro. 



Dr. H. M. W. Edmonds, with the assistance of Assistant Observer 

 Rosemberg, obtained at Huayao, near the proposed site of the Peru 

 Observatory, on May 28, 29, and 30, absolute observations of diurnal 

 variation in declination and inclination with magnetometer and earth 

 inductor, in accordance with the eclipse program, and photographic 

 registrations, from May 25 to June 12, with variometers in declination, 

 horizontal intensity, and vertical intensity. The necessary base-line and 

 scale-value determinations for controlling the magnetograph records 

 were made. 



Mr. A. Sterling made diurnal- variation observations in declination 

 with magnetometer in accordance with the special program at his 

 magnetic station, Puerto Deseado, Territory of Santa Cruz, Argentina. 



