56 SEC. 3. MEASUREMENT. 



242. Nolan's Range Finder. 



1. Two-angle measures. Right and left. 



2. Two Y supports. 



3. Two tripods. 



4. Two tripod buckets. 



5. Two leather boxes with straps to contain items 1 and 2. 



6. A 50 yards measuring tape. 



7. A metal calculating roller. 



8. Two magnifying glasses. 



9. A leather case with strap to contain items 6, 7, 8. 



10. A leather numnah which fits under the saddle of item 1, and 



on which the two boxes, item 5, are strapped. 

 .-,;> War Office. 



243. Two Instruments for Measuring Distances. 

 Constructed by Dr. Meyerstein. 



Prof. W. Klinkerfiies, Gottingen. 



262. Telemeter with prism by Col. Goulier for the rapid 

 measurement of distance. M. Tavernier Gravel, Paris. 



263. Pocket Telemeter. By M. Gautier. 



M. Tavernier Gravet, Paris. 



264. Telemeters. Fortin Hermann Bros., Paris. 



285. Collection of War Telemeters. These instruments, 

 which are based on the speed of transmission of sound, are 

 intended for measuring distances in the field. 



Le Boulenge, Liege. 



3O7. Instrument for Measuring Distances, according to 

 the systems of Kleinschmidt and Breithaupt. 



Royal Museum, Cassel (Dr. Pindcr, Director). 



The instrument for measuring distances was constructed entirely of brass 

 by J. C. Breithaupt during the second half of the 18th century. It consists 

 of a rail of 0-978 m. in length, serving as measuring-base, on both ends of 

 which is attached a movable telescope for sighting the object the distance 

 of which is to be determined. From the known length of the base, and the 

 indicated angles which the adjusted telescopes form with the base line, the 

 distance sought is ascertained by trigonometrical calculation. 



C. GAUGES AND CALLIPERS. 

 11. Set of Gauging Instruments. Dring and Fage. 



Head rod. For ascertaining the head diameter of a cask, and working out 

 the contents. 



Bung rod and slide. For finding the bung diameter and diagonal of a cask. 

 The rod is divided into inches and tenths, with a line of imperial area and 

 diagonal line ; this last gives the approximate content without calculation, 

 and is computed on the assumption that most casks are similar to one another 

 in form, and therefore vary as the cubes of their like dimensions. 



