Since 1890 further and more rigorous application of the telegraphic method of determining longitudes differentially with Greenwich has resulted in a slight correction (amounting to about 2" of arc) to the previous determination by the same method through Suez.
The harbour of Cagliari (along the north side of which runs a promenade called the Via Romo) is a good one, and has a considerable trade, exporting chiefly lead, zinc and other minerals and salt, the total annual value of exports amounting to nearly 12 million sterling in value.
Its emoluments, amounting to £9, 12s.
With the Cape micrometer a systematic difference has been found in the coincidence point for head above and head below amounting to o"-14.
Of uncultivable area covered by lakes, rivers, towns, &c. Only the roughest estimate is possible as to the sizes of holdings, but in general terms it may be said that about 3 million persons are proprietors of holdings under 25 acres in extent amounting to between 15 and 20% of the cultivated area, the rest being owned by some 750,000 proprietors, of whom 150,000 possess half the area in holdings averaging 400 acres in extent.