126 



NEQRETTI AND ZAMBRA, HOLBOJIN TIADUCT, E.G., 



N. & Z's Maximum Registering Thermometer. 



& Z's. Minimum Registering Thermometer. 



N. & Z's. Glashier's Standard Rain Gauge. 



FIG. 127. 



179. NEGRETTI AND ZAMBRA'S FIVE GUINEA SET OF 

 METEOROLOGICAL INSTRUMENTS 



consists of a Mercurial Barometer with attached Thermometer having 

 Fahrenheit and Centigrade Scales, Registering Maximum Thermometer, 

 Registering Minimum Thermometer, Rain Gauge and Graduated Measure, and 

 a Wet and Dry Bulb Hygrometer, fig. 127. 



The whole of these instruments are very carefully manufactured and tested 

 to ensure sufficient accuracy for ordinary observers at a moderate price. One 

 important feature in this set is that the various instruments will travel securely, as, 

 although they are not strictly a standard set, they have all Negretti and Zambra's 

 improvements and Patents adapted to them, and are compared and verified by 

 Negretti and Zambra, and, if desired, Certificates given. 



This set of meteorological instruments can be modified, and extended, to meet 

 the wishes of our customers. Descriptive particulars of the construction and 

 use of these instruments will be found in the previous pages, or in Negretti and 

 Zambra's Treatise on Meteorological Instruments. See page 133. 



