XIX. 



Results of observations taken at New Norfolk for December, 1874 : — 



Barometer mean of three daily readings corrected and reduced 29767 inches. 



Thermometer mean of three daily readings 62"02°. 



Dew point mean position ditto, 50*06°. 



Humidity mean of ditto, '66. 



Elastic force of vapour, "370. 



Solar intensity mean of maximum temperature, 1211°. 



Terrestrial radiation mean of minimum temperature, 45 , 5°. 



Rainfall, 140in. 



Evaporation, 6 67in. in excess of Rainfall, 5*27in. 



Clouds mean amount of three daily observations, 6*04. 



Ozone ditto, 2 ditto 7 '8. 



Wind force in lbs. of 3 ditto, 10G391bs. 



W, E. SHOOBRIDGE, Valleyfield. 



NEW NORFOLK. 

 The following Observations taken at New Norfolk were obtained 

 as follows, viz. : — 



Barometer. — Mean of 3 daily readings (corrected to 32 deg. and 

 reduced to sea level) with a pediment barometer by Casella, reading 

 to within *02 inch of Mr. Abbott's standard in Hobart Town. 



Temperature. — Mean of 3 daily readings of Dry Bulb of Hygrometer 

 by Casella, with which also the dew point, humidity and elastic force 

 of vapour are obtained by Glaisher's tables. 



Duirnal range is the difference between daily registers of self-register- 

 ing max. and min. thermometers by Casella. 



Ozone. — Schonbein's prepared slips exposed for 12 hours and compared 

 with Chromatic scale. 



The above are placed in an instrument house 4 ft. square and 7 ft. 

 high, double-roofed, and surrounded on E.N. andW. by Louvre boards, 

 protected in turn by shutters from the roof, extending 3 ft. down the 

 walls and inclined outwards to afford shade, at the same time allowing 

 a free circulation of air. 



Solar intensity. — Daily registers of Casella's improved self-registering 

 black bulb and neck thermometer placed in vacuo, fixed on outside edge 

 of north shutter of instrument house 4 ft. from the ground. The house 

 is surrounded by a grass-plot, enclosed by a wire fence in which are 

 placed — 



1. The terrestrial radiation thermometer on small brass stand, and 

 enclosed, except the bulb in a glass tube. 



2. Bain guage 5 inches in diameter fixed in stone bottle, from which 

 the water is measured every evening after rain with guage glass. 



3. Evaporating dish also 5 inches in diameter, and holding 4 inches 

 of water to overflow pipe, placed in a stone bottle on the ground the 

 same as rain guage. 



A Lind's wind guage by Varley, is fixed on a pole at S.E. corner of 

 house 18ft. from the ground. 



All the above instruments were imported direct from Casella by Mr. 

 Abbott, of Hobart Town, for scientific purposes and were the best 

 procurable. 



W. E. SHOOBRIDGE, Valleyfield. 



