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For the coast journey the best route, because it shows you much fine scenery on your way, is by way of Soucelito, which is reached by a ferry from San Francisco. From Soucelito either a stage or a private conveyance carries you to Olema, whence you should visit Point Reyes, one of the most rugged capes on the coast, where a light-house and fog-signal are placed to warn and guide mariners.
It was his idea that the sharpness or shrillness of the whistle constituted its chief value. And it is conceded that Mr. C.L. Daboll, under the direction of Prof. Henry, and at the instance of the United States Lighthouse Board, first practically used it as a fog-signal by erecting one for use at Beaver Tail Point, in Narragansett Bay.
Hartmann Bache, of the United States Engineers, in 1858-59, and of which the following is his own description: "Advantage was taken of the presence of the working party on the island to make the experiment, long since contemplated, of attaching a whistle as a fog-signal to the orifice of a subterranean passage opening out upon the ocean, through which the air is violently driven by the beating of the waves.
It appears from the evidence given in 1845, before the select committee raised by the English House of Commons, that the use of the locomotive-whistle as a fog-signal was first suggested by Mr. A. Gordon, C.E., who proposed to use air or steam for sounding it, and to place it in the focus of a reflector, or a group of reflectors, to concentrate its sounds into a powerful phonic beam.
The custom of the mariner in coming to this coast from beyond the seas is to run his ship so that on arrival, if after dark, he shall see the proper coast-light in fair weather, and, if in thick weather, that he shall hear fog-signal, and, taking that as a point of departure, to feel his way from the coast-light to the harbor-light, or from the fog-signal on the coast to the fog-signal in the harbor, and thence to his anchorage or his wharf.
He was too cold, and he was very thirsty. He crouched under the tarpaulin, and presently he ate another hardtack biscuit. He could not hear the lighthouse fog-signal at all, now, and the waves were much bigger under the boat. They lifted her up, swung her motionless for a moment, and then let her slide giddily into the trough of another sea.
Although the fog proved of great assistance to the Japanese in a hundred cases, the stipulated signal for attack, that is, the whistle of the Japanese auxiliary cruiser Pelung Maru, for example, being taken for a fog-signal, nevertheless an annoying surprise awaited the enemy elsewhere.
His stateroom was well aft, and in his drowsy, half-waking moments, he was conscious that the sea was running heavily. He remembered that the wind had been east all day, and that he had seen the danger-signal floating that afternoon. Toward morning he grew more wakeful. The whistling of the fog-signal, which had now become almost constant, vanquished at length his inclination toward slumber.
The siren was adapted from the instrument invented by Cagniard de la Tour, by A. and F. Brown, of the New York City Progress Works, under the guidance of Prof. Henry, at the instance and for the use of the United States Lighthouse Establishment, which also adopted it for use as a fog-signal.
There were thirty days in which during a part, if not the whole, of the twenty-four hours we had out our fog-signal men; that is to say, an additional staff of 300 men, each with his flag and detonating signals, placed within sight, or within sound of one another, to assist the ordinary signalmen in the safe conduct of the traffic.
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