IX, NAVAL ARCHITECTURE, ETC. 523 



2168a. Fair of Ship's Side Lights with lenses. 



John James Nickoll. 



Guaranteed to show the light at two miles, that being the distance required 

 by the regulations for preventing collisions at sea. ^he lenses are so con- 

 structed as to permit the smallest amount of absorption of the rays of light of 

 the colour, and the burner requires no chimney. 



2178ec. Transparency showing the effects of the helm indi- 

 cating signals for preventing coUisions at sea. 



John James NickolL 



2178eca. Set of Ships' Lights ; Port, Starboard, and 

 Masthead Light, arranged to indicate by night the position of 

 ships' helms, to avoid collisions. Nickoll fy Crewe. 



2178ed. Pair of Coloured Lenses for railway and other 

 signals, calculated to show the signals upwards of two miles. 



John James NickolL 



The green signals can be seen at a much shorter distance than the red ; 

 this green lens will show a distance of three miles. 



2178ee. Model of an Anchor invented by Sir Edward 

 Belcher when a midshipman, 1815. 



Admiral Sir Edward Belcher, K.C.B. 



2178ef. Model of a method of forming an improved 

 Anchor when the shank has been broken, proposed by the ex- 

 hibitor in 1830. The method is by means of 3 pieces of ballast 

 iron. Admiral Sir Edward Belcher, K.C.B, 



2178eg. Model in Silver. Patent " Stockless" anchor. 



Wasteneys Smith, C.E. 



- 

 2178eh. Model in Brass. Patent " Stockless " anchor. 



Wasteneys Smith, C.E. 



These anchors are said to possess 



1 . Great holding power, with less weight, besides being diminished in the 

 weight of the stock. 



2. Extraordinary strength, proved at Lloyd's test. 



3. It is always canted, no matter how it falls, and requires no stock to keep 

 it canted. 



4. Being always canted when on the ground, and by the assistance of the 

 horns or toggles, it takes hold as soon as any strain is put upon the cable. 



5. Spare, and wider, and different shaped arms for various grounds may be 

 carried on board. 



6. It will not foul or get fouled, and when holding there is nothing above 

 ground, nor is there any stock to cause accidents. 



7. It trips with great ease, because there is no stock to lift, and the crown 

 end has so large a surface that good purchasers obtained for weighing. 



8. It is easily fished, and can be stowed in-board on deck, thus clear of the 

 bow, and avoiding risk of damage in case of collision of any description. 



