440 J.D. Dana—Lfistory of the Changes in Kilauea. 
highest part of the western wall, a point numbered 7 on his 
map, which is, in all probability, Kamohoalii of Mr. Dodge’s 
map (Plate II of this volume), and 5° 55’ for the angle sub- 
tended by the wall between its summit and the black ledge; 
and that he thus made the height of the wall, 932 feet. There 
is here a slip, for the data give 851 in place of 982. The most 
recent survey makes that distance 8750 feet, using which 
1 2 English miles. 
REFERENCES @———————————t 
1. Crater in action Lord Byron and te 
f party went to. ae 
2,-Avsulphur crater. Strawberries in abundance. 
3. Crater broke out June 29. here. Z 
4, Brilliantly at work night of 29th. : 
5. Largest crater, emitting flame and Fat 
[ERO 3 constant. smoke’ ==... 
..A deep fissure. ZF QP SASS aaa SS 
7. Deepest and most precipitous part as ASS Sy 
8 of Volcano. ecomerrem TMNT Th 
j 8. Place where Lord Byron descend- " Win Teas 
j ed from the Black Ledge to the bottom. NY aw 
# A PLAIN 
Dea eMghoales 
“py eompass §. 8 
Constantly 
concealed by 
smoke S 
SS: 
ic N. 
oS 
Magneti 
KULAU EA 
LIEUT. MALDEN, R. N. 
1825 
number in the calculation we get 907 for the height of the 
wall. It is therefore probable that 900 feet is not far from 
right. 
Lieut. Malden estimated the depth of the lower pit at 400 
feet (and Dampier’s sketch beyond accords with this); but he 
saw it only from above (illness preventing his descent), and 
more than two years after the eruption. The observers of 
August, 1823, and Rev. Mr. Stewart in 1825, made it nearly 
or quite half of the total depth (giving for the total 1700 or 
1800), and this is assumed by Mr. Goodrich in his later letters. 
All accounts and pictures, together with Lieut. Malden’s map, 
make the black ledge narrow. The plates from Hllis’s sketch 
in the “Journal” and “Narrative” (p. 488) make the eastern 
side of it the broader; but the part shown is really the south- 
