The ordinates of the curve give the strain in cwts., and the abscissae the distance in miles measured from the Canso end; as the strain is proportional to the depth, 18 cwts.
Its expansion and importance may be seen from the fact that the imports of waste, knubs, &c., which in 1860 was 1506 cwts., reached in 1905 a record of 72,055 cwts.
In 1905 the total catch of fish of all kinds (excepting shell-fish) amounted to 7,856,310 cwts., and in 1907 (the highest recorded to 1910), 9,018,154 cwts.
The best crystallized specimens have been obtained from Kongsberg in Norway, large masses, weighing as much as 5 cwts., having been found.
In 1896 the quantity was over 243,000 cwts., valued at £14,950; in 1902 it was only 95,663 cwts., valued at £5976..