124 NEGRETTI AND ZAMBRA, HOLBORN VIADTJCT, E.G., 



ESTIMATES FOR SETS OF METEOROLOGICAL APPARATUS. 



177. The Meteorological Congress of Vienna, recognising three classes of 

 Observing Stations, we subjoin estimates for Sets of Meteorological Instruments 

 suited to their requirements. 

 No. 1. For an Observatory or Station of the First Order. 



In which independent meteorological observations are conducted, of the greatest 



precision, either by hourly readings or with the use of Self -Recording Apparatus. 

 One Large Observatory Standard Barometer. 

 One Independent Standard Thermometer. 



One Negretti and Zambra's Patent Standard Maximum Registering Thermometer. 

 One Negretti and Zambra's Patent Standard Maximum Thermometer, 



Exposed Black Bulb. 

 One Ditto Ditto Bright Bulb. 

 One Negretti and Zambra's Improved Patent Maximum Thermometer, in Vacuum, 



with Test Gauge, No. 37. With Stand for ditto. 

 One Negretti and Zambra's Standard Minimum Thermometer. 

 One Ditto Ditto Ditto Mercurial. 



One Ditto Ditto Standard Terrestrial Radiation Thermometer. 



One Standard Wet and Dry Bulb Hygrometer. 

 One Stevenson's Thermometer and Hygrometer Screen. 

 One Glaisher's Rain Gauge, the New Pattern, complete, Copper. 

 Two Extra Graduated Measures for above. 



A Series of Thermometers for Earth Temperatures at varying depths. 

 One Negretti and Zambra's Maximum Thermometer, for Earth or Springs. 

 One Gold Leaf Electrometer. 

 One Anemometer, with two recording Dials. 

 Recording Mercurial Barometer. 

 Recording Thermograph. 

 Recording Hygrometer. 

 Recording Anemometer and Rain Gauge. 

 Sunshine Recorder. 



Cost for the whole of above Kew verified, 330 to 450. 



In first class Observatories it is advisable to have duplicate instruments, 

 where there is any liability of fracture, to avoid breaking off the continuity of 

 the recorded observations. 



The No. 1 Set of Meteorological Apparatus can be much extended if it be 

 desired, to make comparative or experimental observations. 

 No. 2. Estimate for a Meteorological Observatory of the Second Order. 

 One Standard Barometer. 



One Negretti and Zambra's Patent Standard Maximum Thermometer. 

 One Ditto Ditto Standard Minimum Thermometer. 

 One Solar Radiation Thermometer in Vacuo, with Negretti and Zambra's 

 Improved Test Gauge. 



