464 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [28] 



16. FOG-HORNS. 



Collins 7 patent fog-alarm. — (See fig. 3.) This consists of an upright 

 cylindrical bellows of stout grain-leather, supported by and working 

 upon three brass rods which are fastened at the lower ends to a galvan- 

 ized iron pedestal, aud the upper ends of which are secured, by means of 

 screw-caps, to an iron top, to which also is attached the upper part of 

 the bellows. This cap piece is surmounted by a cone-shaped top, hav- 

 ing a hole in its apex into which is screwed a large reed horn fitted with 

 a revolving top or cowl by means of which the sound can be thrown in 

 any desired direction. There are three of these horns, so that in case 

 one is injured it can be instantly replaced by another. 



Fig. 3. — Collins' patent fog-horn. 



The bellows is collapsed or distended by means of an iron lever 

 working on a hinge attached to the base. By moving this lever the 

 air in the bellows is driven through the horn at the top with great force. 

 A very heavy sound is obtained, while the horn can be blown to its full- 

 est capacity with very slight exertion on the part of the operator. 



This implement was originally designed for use on fishing vessels, 

 especially such as are employed in the trawl-line fishery j it is adapted 



