Victorian Exploi'inff Ea^peditian. Ixix 



7. Observations on tlie Zodiacal Liglit may be made with great 

 facility and advantage for science. The limits of the phcnt)menon 

 should be traced npon a good map of stars, and afterwards taken 

 from it and noted in a note-book. 



8. A good look out should be kept for ^letcors ; the declination 

 and right ascension of the beginning and end of their courses, with 

 exact time and accompanying circumstances, should be noted. Par- 

 ticular attention should be paid to meteors near the Zodiac. 



9. Wherever a permanent camp is to be erected, a systematic 

 registration on meteorology should at once be carried on. The hours 

 of registration are to be as numerous as possible. The hours G a.m., 

 9 a.m., 3 p.m., and 9 p.m. being obligatory. The registrations 

 .should extend over the following elements :-- 



Pressure of air, observed with the mercurial barometer, and, in 

 ca.se of an accident happening to the instrument, then with the best 

 aneroid in the camp. The aneroids .should be compared with the 

 mercurial barometer whenever they are to be taken out for taking 

 measurements of heights, or for condixcting meteorological observa- 

 tions in a branch expedition. They ought to be compared again as 

 soon as they are returned to the main camp. 



The aneroids to be observed in a horizontal position. 



In the ease of measurements of heights, Lamont's hypsometrical 

 tables should be used. 



Temperature of air and evaporation are to be observed with Munich 

 hygrometer, in the large portable meteorological stand. 



Direction and force of wind, by the astronomical meridian, and by 

 Beaufort's notations. 



Amount and form of clouds, and direction of the upper current. 



Dm-ation and intensity of rain, dew, hail, &c. ; solar radiation and 

 terrestrial radiation. 



An exact register should be kept on all remarkable phenomena in 

 meteorology, as whirlwinds, storms, thunderstorms, mirage, refrac- 

 tion, twinkling of stars, etc., A:c. 



10. While travelling, the aneroids and the small hygrometer 

 should be easily accessible, so that A\dthout any delay the observa- 

 tions can be made at the hours above mentioned, such observations 

 to be used afterwards for computing the height of the ground passed 

 pver. 



The temperature of rivers, creeks, lakes, and wells should be 

 observed on the .surface, and with the help of the sounding thermometer 

 on the bottom. Should gases arise from the depth, they should be 

 caught in small glasses prepared for the purpose, in order to have 

 them analysed afterwards. 



11. Particular attention should be paid to the direction of the 

 flights of birds. 



12. Magnetical observations, in addition to the determination of 

 the variation of the compass, should be carried out whenever an 



