Prize of £50 or a Gold Medal to the Designer or Maker of the 

 most serviceable Reflecting Instrument for the Measurement of 

 Angles. 



The Council of the Royal Geographical Society having taken 

 into consideration the importance of Reflecting Instruments to 

 practical geographers, and acting under the belief that many 

 improvements in sextants and circles have been devised, both in 

 this country and abroad, which are not generally known and have 

 never been adequately combined in a single design, have deter- 

 mined to offer a prize of 50/. to the designer or maker of that 

 Reflecting Instrument which shall in their opinion most nearly fulfil 

 the following conditions, in addition to that of general accuracy : — 



1. Portability ; simplicity of packing; security from concussion. 



2. Capability of measuring large angles. 



3. Independence of natural or detached horizon. 



4. Distinctness in reading off, by day and by night. 



5. Convenience in handling ; adaptability to stand for use in 



field. 

 0. Efficiency of adjustments. 

 7. Power of measuring faint objects. 



The divided arc to be from 3 to 8 inches radius. 



The instruments to be sent in cases, suited for immediate use in 

 land travel. 



The instruments will be received at the Society's rooms until 

 the close of the present year. 



