45, COBNH1LL, B.C., AND 122, REGENT STREET, W., LONDON. 



149 



FIG. 201. 



197 Ship or Yacht Aneroid Barometers in strong plain Metal or ornamentally 



carved Wood mountings. Extreme convenience of size, combined with great 

 sensibility and reliability, have made these instruments very popular for 

 state cabins of Sea-going Vessels and Steam Ships. 



198 Ships' Aneroids, plain Circular Bronzed Metal Mountings, 



with Thermometer on the dial . . 330550 660 



199 Ships' Aneroids in handsomely Carved Wood Frame with 



Thermometer (fig. 199) 660 880 



200 Ships' Aneroids, . . . smaller sizes 3 303 10 440 

 At pages 21 to 29 will be found a full description of the construction and use 



of various forms of Aneroid Barometers. 



201 Negretti & Zambra's new Fisherman's Aneroid Barometer (fig. 201). 



No trouble or expense has been spared to obtain a trustworthy instru- 

 ment at a moderate cost. It is mounted in a stout metal case, with a 

 plate glass covering, the dial is of enamelled metal and 5 inches diameter. 

 The range of scale is 26 to 31 inches, subdivided into tenths, corresponding 

 with the scale of the Mercurial Barometer. Price, 1 15 



It will be noted that at the top of the Dial is placed the word CHANGEABLE ; 

 to the right and left of this word is printed a condensed form of Admiral Fitz-Roy's 

 rules for prognosticating the coming weather. 



Should the Blue Index move to the right fine weather may be anticipated ; on 

 the contrary, should it recede to the left, bad and stormy weather is indicated. 



These movements correspond with those of the Mercurial Barometer, hence 

 the Aneroid, like the Mercurial Instrument, is said to be Rising, Falling, or 

 Steady. 



201* Negretti and Zambra's Farmers' Aneroid, mounted in frames, similar to 

 fig. 154. 4 4s., 4 10s. 



