158 
THE TELEGRAPH. 
ing formed of strips of phosphorized copper (Muntz metal) laid 
spirally over the strongly woven hemp rope-work. As the 
copper strips overlie each other, they grasp the hemp strongly, 
and prevent it from contracting lengthways. A very strong 
and light cable is thus obtained, so that the cable we have 
figured is able to bear the weight of one ton before it breaks, 
and it would elongate to the extent of only 8 per cent, under the 
strain of 10 cwt. 
GO-*-J 
Fig. 90 . —Shore end of the Brest and Saint-Pierre Miquelon Cable. 
Cables are sometimes put on board as soon as they arc manu¬ 
factured ; sometimes, on the other hand, they are stored in 
tanks at the works until the steamer is ready to receive them. 
Fig. 102 shows the plan and section of large works with ten 
spinning-machines and thirty storing tanks, capable of holding 
as much as 2,000 nautical miles of cable. The figure also 
shows the plan and section of a steamboat with nine tanks. 
Fig. 103 represents the aft part of a steamer with the machinery 
for paying out the cable, and the cabin in which the experi¬ 
ments are" conducted during the laying of a cable. 
