MAUNA LOA. 



151 



while to obtain a camera lucida sketch of him, as he sat wrapped in 

 his tapa. 



KEAWEEHU. 



Treble, the armourer, succeeded in mending the bar of the pen- 

 dulum frame, and rendered it as good as it was originally. 



The thermometer stood at noon, in the sun, at 92° ; in the shade, at 

 55° ; and at night it fell to 13°. 



The 31st was another fine day, and we continued to receive pro- 

 visions, wood, &c, from below, until we were well supplied. This 

 enabled me to issue the full ration. We were also gladdened with 

 letters from Honolulu, and news from the ship. They had experienced 

 at Honolulu, on the nights of the 23d and 24th, a very heavy storm 

 from the southwest, simultaneously with the one that annoyed us on 

 the mountain. A greater degree of cold was experienced there than 

 they had had for years. At Hilo, during this time, very light variable 

 winds and calms prevailed. 



We were employed this day in erecting the pendulum-house, over 

 which was placed a thick hair-cloth covering, and outside of all, a 

 No. 2 canvass tent, surrounding the whole house, and enclosing a 

 stratum of air. On the outer side a wall was built up to the eaves of 

 the house, and all the cords drawn tightly through it. 



It was with some difficulty that any level spot was found sufficiently 

 large to place even the pendulum-frame, and we were obliged to cut 

 away with our axes and chisels, a portion of the lava that was uneven, 

 until a suitable place was made. 



The temperature at night was 17°; the weather clear and cold. 



On the 1st of January, 1841, we were still erecting the pendulum- 



