106 



NEGBETTI AND ZAMBEA, HOLBOEX VIADUCT, E.G., 



FIG 116. 



147. Robinson's Anemometer, mounted in gimbals for Marine Service. 

 This instrument not having been found of much practical value will only be 

 made to order. 



Robinson's Anemometers should be fixed in an exposed situation, as high 

 above ground as may be convenient for reading. It can be made very portable 

 by having the arms which carry the cups being fitted to unscrew or to fold down. 



148. Whewell's Self-registering Anemometer, for recording the 

 amount of horizontal movement in the air, with the direction, for twenty-four 

 hours. A full description of this Anemometer will be found in Negretti and 

 Zambra's Treatise on Meteorological Instruments. It is now rarely used, 

 Osier's and Beckley's arrangements having been found more practically useful. 



Price, 25 



Any of these Anemometers can ~be supplied metrically divided if desired. 



149. Osier's Self-registering Anemometer and Rain Gauge 

 (fig. 117). This improved arrangement of Anemometer was shown by Messrs. 

 Negretti and Zambra at the International Exhibition, 1862, having Robinson's 

 Cup Anemometer added to it, so that the pressure and velocity appear on the 

 same sheet on which a line, an inch in length, is recorded at every 10 miles. 

 The Improved Anemometer shows the Direction, Pressure, and Velocity of the 

 Wind, also the amount of Rainfall upon one Sheet of paper. Our woodcut is 

 not given as an actual working drawing of Osier's Anemometer, but simply to 

 exhibit the relative position of its several parts. The mechanism may be 

 variously modified, but the following is a description of the most recent and 

 improved arrangement. 



