502 Scientific Intelligence. 
Greenwich was easily connected with Porth Curno, in Cornwall, 
whence there is an uninterrupted line to Alexandria, = longest 
submarine line in the world; Alexandria was connected with 
Mokattam by aid of the special new constructed by yt Khedive 
rom Cairo to the station. It is further stated that time-communi- 
cation was also made from Mokattam through Cairo to Thebes, 
and to Suez by the peerety baphipase: Thebes and Suez being the 
other Egyptian stations where the transit was observed. 
In the Sandwich Islands ani assistance was seceived from King 
sea 
station was at Honolulu, the longitude of which was determined 
partly by meridian- transits of the moon and partly by transits o 
the moon observed with the Altazimuth instrument. Waimea, 
the island Kauai, where observers were also placed, was connected 
with Honolulu u by means of chronometers carried in H.M.S. Zeredos. 
At the Tsland of Rodriguez the longitudes were determined in the 
same manner as for the Sandwich Islands stations, for three posi- 
tions, viz: Point Venus, the Hermitage, and Point _ an 
the acrextioun and Sir George Airy hind at first bee ade d to 
suppose that all useful observation had beenslost ; it sakanoie 
appeared, however, that this was not the case, "one phase of the 
transit being w well seen at Burnham, the longitude of which was 
fixed by meridian transits of the moon 
The report is divided into three sections or tables. In the first 
are given the descriptions of the various phenomena, in the words 
ith the Greenwich sidereal times of the different 
phases, obtained from accurate reduction of the observations for 
longitude here particularized ; where such longitudes depend upon 
lunar ea the places ‘of the Nautical Almanae were care- 
fully corrected by observations on nearly the same days at Green- 
wich, Paris, Strasburg, and Konigsberg. In studying these 
or iginal descriptions, Sir George Airy was led to infer that it was 
“possible to fix upon t three distinct phases for the Zngress and 
four for the Egress,” though it might have been supposed that 
Egress and Ingress would exhibit “the same number of distinct 
i ases in inverse order; this was not the case a practice. The 
r e 
