C.D. WALCOTT 
THE 
AMERICAN JOURNAL OF SCIENCE. 
[THIRD SERIES.] 
Art. X.—Kilauea after the Eruption of March, 1886.* 
With Plates I and ILI. 
I, Communication to Professor W. D, ALEXANDER, Surveyor 
General of the Hawaian Islands, by J. 8. Emerson, Assistant 
in the survey, dated Aug. 27,1886: On Observations in Kilauea 
made between March 24th and April 14th, 1886. (With Plate I.) 
. . » Lreached the Volcano House soon after noon, March 24th 
(174 days after the eruption) and remained three weeks, until 
April 14th. During much of this time the rain, drizzle and 
fog interfered materially witb my work, but I had enough clear 
weather to accomplish most of what I had proposed to do. 
With the kind assistance of the photographer, ‘Mr. T. P. 
Severin, I measured a base line, 3532 feet in length, on the 
plain above the crater, near its northwest edge. With this base 
line I connected by triangulation the main points of my survey, 
filling in the details with a telemeter rod. Particular attention 
was paid to measuring vertical angles, from which I was enabled 
to compute the true height of every point located on the ac- 
companying map, referred to the veranda floor of the Volcano 
house taken as datum. Im addition to the information given 
on the map, I would add the following. 
* For the communications here published, on the condition of Kilauea since the 
eruption of the 6th of last March, the editors are indebted to Professor Alex- 
ander. A brief account of the eruption is contained in vol. xxxi, p. 397 (May, 
1886.) 
Am. Jour. Sc1.—THIRD SrRies, Vou. XX XIII, No. 194.—FEBRUARY, 1887. 
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