382 
SIR XOR^IAN LOCKYER AND OTHERS 
meters, and for the count of time during totality the eclipse clock, which has heen 
described in my previous reports on eclipse exjreditions, was utilised. 
The arrangements for securing signals at definite intervals before totality were 
identical with that employed in Lapland and India. An image of the sun projected 
by the finder of the 6-inch two-prism prismatic camera was viewed on an adjustable 
screen, marked in such a way that it w'-as easy to see when the cusps subtended 
angles of 90° and 55°, which occurred respectively at 16 seconds and 5 seconds before 
totality. The signals “ Go” at the commencement of totality, and “ Over” at the 
end, were given by myself from observations made with the 4-inch Cooke telescope. 
The complete system of signals was as follows :— 
1 . “ Pdse up,” 10 minutes before totality— 
Observers turn hacks to sun. 
Clocks to be wound. 
Stops and caps of telescopes, siderostats, and ccelostats to be removed. 
Eclipse clock to he set. 
2 . “ Alert,” 5 minutes before totality^— 
Disc observers to be blindfolded. 
Observers report all in readiness. 
3. “G G,” 16 seconds before totality. 
4. “ G,” 5 seconds before totality. 
5. “ Go,” beginning of totality. 
6 . “ Over,” end of totality. 
At the eclipse clock two meii were stationed, one calling the number of seconds 
remaining up to 30, and the other during the remainder of totalit}". 
In consequence of the perfect drill during the rehearsals, the operations during the 
eclipse were carried out with great precision. 
Achioivledgments of Assistance. 
The thanks of the expedition are due especially to those named in the foregoing- 
account, not only for assistance rendered, Imt also for their great kindness to us. I 
have already, in a letter, expressed to the Royal Society my deep sense of obligation 
they have laid us under. 
As in the case of the “ Volage” and “Melpomene,” the officers and men of the 
“Theseus” not only assisted us with certain instruments, but organised crews for 
others, and many lines of work which it was impossible for the observers sent out from 
England to attempt. Their skill, resourcefulness, and steadiness were alike truly 
admirable. 
Tlianks are also due to the Managers of the Orient Steam Navigation Company, 
who conveyed the instruments to and from Gibraltar freight free. 
