132 



NEGEETTI AND ZAMBRA, HOLBORN VIADUCT, E.G., 



NEGRETTI AND ZAMBRA'S BAROMETER 



CHARTS. 



AND THERMOMETER 



"THE DAILY TELEGRAPH 

 BAROMETER CHART. 



[FROM NEGRETTI AND ZAMBRA'S SELF-REGISTERING 

 BAROMETER.] 



The method of keeping the 

 Barometer and Thermometer 

 Charts is well shown in our 

 diagram, (fig. 134). This is an 

 actual reprint from a Chart pub- 

 lished in the Daily Telegraph 

 newspaper, of the morning of 

 May 21st, 1877. 



By a most ingenious arrange- 

 ment of fixed and movabletypes 

 invented by Negretti and Zambra, 

 the rise and fall of the mercury 

 in the Barometer tube (as indi- 

 cated by Negretti and Zambra's 

 Recording Barometer) is pub- 

 blished every morning in the 

 Daily Telegraph, the diagram 

 exhibiting the indications of the 

 Barometer for the previous four 

 days and to within a few hours 

 of going to press. 



Modifications of this method of publishing a daily Barometrical record 

 have been carried out by the firm for several other daily papers, and in varying 

 forms are now used by almost every daily and weekly newspaper. 



FIG. 134. 



The above chart represents the movement of the 

 oarometer. corrected for sea-level and reduced to 32 F., 

 during the last four days ending midnight, May 20-21. 



GENERAL REMARKS. A return of a north-easterly 

 wind, accompanied by occasional showers of drizzling 

 rain, caused the weather yesteiday to be very bleak and 

 unseasonable* The barometer rose throughout the day, 

 the reading at midnight being 80' 11. 



DOVER. Fine and cold ; wind S.W. ; sea rough j 

 bar. steady. 



144. CHARTS FOE KEEPING A RECORD OF THE VARIATIONS or THE BAROMETER 



AND THERMOMETER. 



Each sheet is ruled and figured for one month's observations ; twelve of these 

 sheets are neatly mounted on a card, so that when one month's readings are 

 ended the sheet can be removed by cutting round the edge with a sharp knife, 

 and a fresh sheet will be exposed. These records form a most interesting and 

 valuable reference for comparing present and past weather. 



Price of each pad of 12 sheets, for Barometer, 2s. 6d. 



Ditto ditto for Thermometer, 2s. 6d. 



Combined ditto for Barometer, Thermometer, Hygrometer, Eainfall, &c., 2s. 6d. 



These Pads of Charts can be forwarded by Book Post for Fourpence. 



Ruled Cliaris or Diagrams for the Recording Barometer, fig. 21, and Recording Aneroid 



Barometer, figs. 28 and 29 price, per hundred 150 



Ditto Ditto, for Recording Anemometers, figs. 117. 118 and 118* 150 



Ditto Ditto, Ditto, Tide Gauges, figs. 125 and 126 1 1 



