METEOROLOGY. 



INTRODUCTORY. 



T. Meteorological observations were begun on October J8, ls,sl, and continued without inter- 

 ruption until the station was closed on August 27, 1883. They were then renewed on board of the 

 schooner Leo, and continued till 1 a. in., October 7, 1SS3, when the vessel was inside the Ciolden 

 Gate. 



From the opening of the station until June 5, 1882, the thermometeis and hygrometers were 

 exposed in a shelter placed on the north side of the back storm-porch (see plan of station, pi. 2). 

 This consisted of a box of galvanized iron louvre-work, with a Hat roof of the same material, 5 feet 

 long and 4 feet broad, mounted on posts ." feet above the ground. This was inclosed by wooden 

 louvre-work blinds on the three exposed side.?, reaching to the ground, and had a wooden floor. 

 On Juno 5, 1882, the instruments were removed to a larger and more convenient shelter, farther 

 away from the quarters, extending along the northern side of the building from the northwest 

 corner, and entered by a door at this corner (see plan, as above). This was made of wooden louvre- 

 work blinds, fastened to studding, with sealskin deprived of the hair fastened up inside, so as to 

 inclose an air-space of 4 inches open above and below. The roof was of walrus-hide. The shelter 

 was 1C feet long by 4 feet broad, and reached up to the caves of the building. 



The thermometers, &c., used in the observations on the voyage home, were mounted in a shelter 

 <if galvanized iron louvre-work, lashed on the starboard side of the, quarter-deck. 



The barometers were hung in the southeast corner of the quarters, near the window. The 

 wind-vane was placed on the roof, north of the ridge-pole, so that the rod passed down through 

 the ceiling of the wash-room. The anemometer was first mounted on the ridge-pole, at the west end 

 of the building, but on the completion of the bastion, June 13, 1SS2, was removed to the top of 

 this., The self-register of the anemometer was on the mantel-shelf in the quarters, and the bat- 

 teries on the shelf in the, wash room. The rain-gauge occupied the place of the anemometer when 

 this was removed. 



During the extremely low temperatures it was found impossible to get satisfactory result;, 

 with the wet- and dry bulb hygrometer, and the relative humidity was accordingly observed witli 

 the hair hygrometer. 



The highest temperature observed during the occupation of the station was G0.5, the lowest 

 52.G, giving a range of 113.l. 



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