652 SEC. 15. GEOGRAPHY. 



Preston's Liquid Compass. A steering compass ; same 

 construction as Dent's without air chamber. 



Dent's Axis Compass (Patent 1844). Card with four heavy 

 and deep needles, attached to axis working in socket above and 

 below, preserving card parallel to surface. 



Steering Compass, by Captain Walker, K.N. Card with 

 single needle, centre of gravity below point of suspension ; pivot 

 long and on a brass bell-shaped cap, the latter cap working also 

 on a pivot. 



Grey's Vertical Compass (Patent 1854). Liquid between 

 outer and inner bowls; card with two dipping needles; pivot 

 inverted. 



Gowland's Liquid Compass (Patent 1854). Rim of card 

 vertical ; pair of needles ; pivot inverted. 



Compass by Mr. Keen (Patent 1854). Porcelain bowl; card 

 two single needles ; pivot on springs inverted ; cap centred in 

 india rubber ring. 



Magnets used in correcting ship's compasses. Hardsteel ; 

 6 inch ; 10 inch ; and 12 inch. 



3151d. Floating Mariner's Compass. 



Dumoulin Froment, Paris. 



3151e. Eclimetre for floating compass forming a spherical 

 spirit level for quick elevation. Dumoulin Froment, Paris. 



31511. Albini's Registering Steering Compass. 



Elliott Brothers. 



The instrument consists of a steering compass, with clock and apparatus 

 attached, for printing on a slip of paper the direction of the ship's course 

 every five minutes, the clock giving the exact time for eight days without 

 winding. An instrument of this description placed in the captain's cabin 

 would thus enable him to have a record of a whole voyage. 



3151k. Dipping Needle and Compass used by Captain 

 Cook during his voyage round the world. 



Royal Naval Museum, Greenwich. 



31511. Chinese Compass, from a collection made by Mr. 

 Cory ton, Barrister-at-law of the Temple. 



Royal Naval Museum, Greenwich. 



3151m. Symon's Compasses. L. Casella. 



31 5 In. Coloured Compass Cards. Max. Raphael, Breslau. 



