772 FISHERIES OF THE UNITED STATES. [128] 



Noiseless rowlock — Continued. 



raised when it is being feathered, in order to prevent its con- 

 tact with the water in rough weather. My improved rowlock 

 is composed of an inclosing ring located on a pintle, and an 

 inner ring inclosed by the ring and adapted to be partially ro- 

 tated therein ; the inside of the inclosing ring is provided with 

 a groove, which extends almost around it, its continuity being 

 broken only by a stop. The pintle of the rowlock is inserted 

 in a socket attached to the gunwale of the boat, the pintle and- 

 rowlock being adapted to turn freely in the socket. From the 

 foregoing it will readily be seen that an oar pivoted in the in- 

 ner ring is adapted to be partially rotated, iu addition to its 

 oscillating movements, so that when its stroke is completed it 

 can be turned so as to feather the blade in the recover stroke. 

 The stop and shoulders of the inner ring are arranged in such 

 mutual relation that the shoulder abuts the stop, in feathering 

 the oar, before the blade becomes horizontal in cross-section, 

 so that the cross-section of the oar is unnecessarily inclined 

 downward from its forward to its rear edge during the feather- 

 ing stroke, this inclination of the blade preventing its forward 

 edge from engaging with the water and overturning the rower, 

 or, in other words, causing him to ' catch a crab.' This limita- 

 tion of the oar in its rotation prevents awkward accidents in 

 feathering, and enables an unskilled person to row with a con- 

 siderable degree of certainty." — (F. D. Graves.) 



East River rowlock. 



Made of galvanized iron. Called also Blackburn's rowlock. It is 

 made in one piece, 10 inches long and 3 inches high, and screws 

 on the gunwale. Middletown, Conn. 25,089. Wilcox, Critten- 

 den & Co. 



North River rowlock. (Albany pattern.) 



Made of galvanized iron. Height, 5 inches. Middletown, Conn. 

 25,087. Wilcox, Crittenden & Co. 



North River rowlock. (Toledo pattern.) 



Made of galvanized iron. A small rowlock with cross-pin and 

 socket. Height, 5J inches. Middletown, Conn. 57,548. Wil- 

 cox, Crittenden & Co. 



Whitehall pattern rowlock. 



Made of galvanized iron, with socket. Called also East River row- 

 lock, and used on Whitehall boats in vicinity of New York. 

 Two sizes, 5£ inches high. Middletown, Conn. 25,115. Wil- 

 cox, Crittenden & Co. 



