92 



S. SEKIYA AND Y. KIKUCHT 



ments, we ascended on July 31st and remained on the summit till 

 the 8th of October. It was mainly owing to Mr. Toya's patient 

 labour that we were enabled to arrive at the valuable conclusions 

 deducible from the survey. The spot selected for our camp was 

 Nakanoyu, a spa almost on the very edge of the crater, that is to say, 

 not more than one hundred metres from it — a position admirably suited 

 for our purposes. Though so close to the volcanic focus, the spa had 

 escaped total destruction, being situated at the back of the crater, and 

 screened by a hill brow from the direct effects of the explosion. 

 As might be expected, our surveying and other works on the summit, 

 the fruits of which are embodied in this paper, were not unattended 

 by discomforts and difficulties — such, for example, as indifferent food, 

 breakneck ascents and descents, foul vapours, chilly nights, and long 

 sultry summer days spent in scrambling over a scorched and barren 

 crater. 



Soon after the eruption we sent letters of inquiry to a large 

 number of schoolmasters and local officers in the neighbouring pro- 

 vinces ; accounts given by other observers, as well as those published 

 in newspapers, were also duly considered. The information embodied 

 in the answers to our letters was very valuable for the purposes of 

 this paper, especially in preparing Plate XXIV, and Ave take this op- 

 portunity of expressing our sincerest acknowledgment t<> all win» thus 

 helped us. We also tender our liest thanks to the colleagues and 

 friends who have since assisted us, by suggestions and otherwise, es- 

 pecially to Major-Genera] Palmer. P. E.. for kindly helping us with 

 our English and for many valuable hints. 



The questions we asked in our letters were mainly as follows : 

 The names and addresses of the observers. The times at which they 

 first noticed the eruption. Did they hear the sound of the explo- 

 sion? Its nature, duration, loudness, etc. Did they see steam (com- 



