DEFLECTION OF LIGHT — DYSON AND OTHERS. 139 
plates employed were Special Rapid and Empress, and those of the 
Imperial Co., Special Sensitive, Sovereign, and Ordinary. 
The instruments were carefully packed and sent to Liverpool a 
week in advance, with the exception of the objectives. These were 
packed in cases inside hampers and remained under the personal care 
of the observers, who embarked on the Anselm on March 8. 
III. THE EXPEDITION TO SOBRAL. 
[Observers, Dr. A. C D. Croinmeliu and Mr. C. Davidson.] 
9. Sobral is the second town of the State of Ceara, in the north 
of Brazil. Its geographical coordinates are : Longitude 2h. 41m. 25s. 
west; latitude 3° 41' 33" south; altitude 230 feet. Its climate is 
dry and though hot not unhealthy. 
The expedition reached Para on the Anselm on March 23. There 
was a choice of proceeding immediately to Sobral or waiting for 
some weeks. It was considered undesirable to go there before we 
heard from Doctor Morize what arrangements were being made, so 
we reported our arrival to him by telegram and decided to await his 
reply. As we had thus some time on our hands we continued the 
voyage to Manaos in the Anselm^ returning to Para on April 8. 
By the courtesy of the Brazilian Government our heavy baggage 
was passed through the customs without examination and we con- 
tinued our journey to Sobral, leaving Para on April 24 by the steamer 
Fortaleza and arriving at Camocim on April 29. Here we were met 
by Mr. John Nicolau, who had been instructed to assist us with our 
baggage through to Sobral. We proceeded from Camocim to Sobral 
by train on April 30, our baggage following the next day. 
We were met at Sobral station by representatives of both the 
civil and ecclesiastical authorities, headed respectively by Dr. Jacome 
d'Oliveira, the prefect, and Monsignor Ferreira, and conducted to 
the house which had been placed at our disposal by the kindness 
of its owner, Col. Vicente Saboya, the deputy for Sobral. We were 
joined there nine days later by the Washington (Carnegie) Eclipse 
Commission, consisting of Messrs. Daniel Wise and Andrew Thom- 
son. 
We are greatly indebted to Dr. Leocadio Araujo, of the State 
Ministry of Agriculture, who had been deputed to interpret for us 
and to assist us in our preparations. His services were invaluable, 
and contributed greatly to our success, as also to our well-being dur- 
ing our stay. 
10. A convenient site for the eclipse station offered itself just in 
front of the house; this was the race course of the Jockey Club, 
and was provided with a covered grand stand, which we found 
