APPENDIX. 363 



diture of stores will take place, unless by a requisition approved 

 by me. 



Great care and economy of stores is enjoined upon the commanders 

 in regard to the expenditures of provisions and stores ; and much is 

 expected, in regard to their preservation and expenditure, from the 

 well-known prudence and attention of the officer commanding the 

 Relief. 



The attention of the commanders of the respective vessels is parti- 

 cularly called to the expenditure of wood, and every precaution is 

 enjoined for its economical consumption. 



The monthly returns will not only embrace the actual condition of 

 the provisions and stores, but the quantity of wood, water, &c, on 



hand, and expended. 



Chaexes Wilkes, 

 Commanding Exploring Expedition. 

 U. S. Ship Vincennes, 



Hampton Roads, August 14th, 1838. 



X. 



GENEEAL INSTRUCTIONS RELATIVE TO OBSERVATIONS. 



The surgeon and his assistants will take the meteorological obser- 

 vations at 3 p. m., 9 p. m., 3 a. m., and 9 a. m. ; viz, the standing of 

 barometer, thermometer, and hygrometer. 



The temperature at the masthead, and that of the water, wind, 

 weather, and the force of the wind, the quantity of rain, &c. ; the 

 officers of the watch will note and make any remarks of their own, 

 regarding facts that may have occurred, (during their watch,) in the 

 meteorological journal : all astronomical and atmospherical pheno- 

 mena, it is desired may claim attention, and be noted under their 

 respective heads. Astronomical phenomena, such as shooting stars, 

 zodiacal lights, aurora borealis, the height of their arcs, their colours, 

 &c, measured and the direction they take in the heavens. Atmo- 

 spherical phenomena, such as rainbows, halos, water-spouts, lightning, 

 appearance of the clouds, rain, the Magellanic clouds, to be noted when 

 first observed ; in short, any unusual appearance connected with the 

 weather. 



Of the sea, all phosphorescent lights, fishes, and all substances 

 adhering to weeds, must not fail to claim attention, and specimens of 

 them obtained. Fish caught must be preserved till opened in the 

 presence of an officer, and their stomachs carefully examined, and if 

 any thing is found, it must be taken care of. 



Things and animals that might in ordinary cases be deemed trouble- 



