734 fisheries of the united states. [90] 



Patent fog-horn. 



Tin ; trombone shape ; with wooden pusher. Length, 2 feet 8 inches. 

 Gloucester, Mass., 1883. 57,807. U. S. Fish Commission. Not 

 sufficiently powerful to be used on fishing-vessels. 



Series of common reed fog-horns. (Nos. 1, 2, 3, and 4.) 



Tin ; ordinary type of fog-horn, blown by the mouth. Middletown, 

 Conn. 29,382. Wilcox, Crittenden & Co. 



Grand Bank fog-horn. 



Called by the fishermen " lipper " or u ripper." Provincetown, Mass. 

 25,783. William H. Weston. 



40. Preservative fluids and paints. 



Canvas and rope preservative. 



Nelson's patent preserving solution for canvas, ropes, and netting. 

 Made by Chresten Nelsen. Gloucester, Mass., 1880. 32,801. 



" This solution is used to preserve canvas from injury by exposure 

 to the weather, in any climate. Sails, &c, treated with the so- 

 lution do not mildew or become stained in the least, but retain 

 the appearance of new canvas after having been treated, and 

 are as strong as when new." 



Preserved canvas. 



Piece of canvas showing the operation of Nelson's preserving solu- 

 tion. Chresten Nelsen, Gloucester, Mass., 1880. 32,802. "This 

 piece of canvas was exposed to the weather-, on damp ground, 

 for six months, after half had been saturated with the pre- 

 serving solution." 



Preserved canvas. 



Piece of canvas showing the operation of Nelson's preserving solu- 

 tion. Chresten Nelsen, Gloucester, Mass., 1880. 32,803. "This 

 piece of canvas was exposed to the weather, on damp ground, 

 for two seasons, after one-half had been thoroughly saturated 

 with the preservative solution." 



Preserved rope. 



Piece of rope showing the action of Nelson's preservative on manila 

 rope. Chresten Nelsen, Gloucester, Mass, 1883. 



Preserved netting. 



Pieces of netting showing the action of Nelson's preservative on 

 netting. Chresten Nelsen, Gloucester, Mass., 1883. 



