II. LENGTH. 47 



from the equator having been calculated to be 5130 ys toises, it was legally 

 accepted as " metre oral et definitif" at 443-296. 



" Cette unite nominee metre qui est le dixmillioneme partie du quart du 

 meridian revient selon les anciennes mesures & 3 pieds 1T296 lignes, en em- 

 ployant la toise du Peron a 13 degres du thermometre & mercure divise en 

 80 parties." 



312. Standard Meter on brass in mahogany case. 



Ed. Sprenger, Berlin. 



313. Standard Meter on Steel. Ed. Sprenger, Berlin. 



314. Standard Meter on Wood. Ed. Sprenger, Berlin. 



315. Standard Tape Measure, 20 meters. 



Ed. Sprenger, Berlin. 



315a. Standard Stirling Ell, believed to be a copy of the 

 standard Scottish ell adjusted at Edinburgh, 26th of February 

 1755. The Burgh of Stirling. 



B. TELEMETERS. 



226. Telemeter. For measuring the distance of inaccessible 

 objects. Patrick Adie. 



This instrument, the first of its name, was patented by Mr. Adie in 1863. 

 It consists of two powerful telescopes at the ends of a fixed base ; the united 

 rays, by total reflection, give simultaneous observation in the eye-piece. 



234. Telemeter, for determining distant inaccessible points 

 by one observation. Manufactured by Adie & Son, Pall Mall. 



Professor Pigot. 



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. 



Executed by Dr. Meyerstein. 



Professor W. Klinkerfues, Gottingen. 



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

 measurement of distance. M. Tavernier Grave f, Paris. 



