great quickening of all revolving lights. ing the contact. The wire, B, is twelve inches long, and it drum near the back ‘end of the boiler after it has thoroughly (2) The application of a group of dot-dash signals to every ought to be fine enough to present a sharp point of contact separated from… … tish,and Irish coasts stances. The Singer Manu- there are in all facturing Company eighteen, in which have forty of these boilers, Messrs. Matthiessen & Wiechers knife-edges crossing one another. The contact must also the perjods are ten seconds or less, and the times of ex- be perfectly clean and…
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