\"1. All ix.iiiiinatiiiii nt" tlic iiiili\ iiliuil results in i-itlicr Jlr. Kiiiiipiiv^V. or 

 ]\fessi-s. NiikaimiiM ;iiiil WiuUv's calculations will show tliat for an aLcmate niuasiire- 

 inetit l)iit little reliance can be placed on the Laronieter, variations of ^O metres 

 from the uvemfire in either of themnot l)eiiifr uncommon. 



It has been fonnd from long series of hourly and simultaneous observatious, 

 lliat the lieights cjilculated by any of the ordinary fonnul.-c from these observa- 

 tions are subject to scveiiil thictuations. Gcnendly, a hciL^ht determined in siun- 

 mer is greater than when determineil in winter; and y;reater in the daytime 

 than in tlio night. The lieight thus follows roughly the variations in the baro- 

 metric column, but not in such a way that we are able to lind the time when 

 the fornuda will give the mean height, when we know the time at wliich the 

 barometric colunm is at its mean height. As both the sets of observations were 

 made in the daytime and in summer we can say tliat the lieights detrnniiied 

 from these data are [irobably too great, but we can not say how much too great. 



VI [. Jfr. Fntami of the Surveying liureau has kindly furnished me with data 

 from which to calculate the height of the mountain trigonometrically. His ob- 

 wrvations of altitude were tiikeii at three of the stations of the Geodetical Survey, 

 one at Kano^can Civst of Tokio Bay, another at Amagisan in Idzu, auil the third 

 at Tauzawayama near Oyauia. The instrmnent used was a theodolite reading 

 by two verniers to ;")"; the barometer and thermometer were read at every 

 observation. I Iiav<' used oidy the observations taken at Kauo/.an anil 

 'i'anzawayama. 



The hi-'ight of Kauozan was founil by levelling I'rom the sea-sliorc to be 

 !i.")52 mctix«!; an 1 the instrmnjnt was l.G metres above the ground. 



In calculating the height of Tanzawayaiiii and Fnjinoyaina I have use 1 

 ilani'i'iifeind's formula, which may be (bund in his Klemente der Vermessungs 

 knnde Vol. 2, jiage 2^1, or in the U. S. Coast Survey. Ivejiort for 1870 [lage IGtJ. 



Tlie results were a.s follows 



T. above K. 



K 



. \k:\u\\ T 



!•'. above K. 



K. above T. 



1222.7 m. 





11'.)«. 2 





2218. 



1227.:^ 





12U.S..S 





2217 



1218..') 





1210.8 



:i4:w.<; 



2217 



I22r>.r» 





1202 :. 



:i44i 





J2i4.2 











Sums (;iOS.4 





4821).:'. 



(;.s8(i.(; 



(ii;.'i2 



Average 1221.7 





1 20;-.. 1 



:U4<).:5 



2217. 



Tal«.ve K = 12i;M 

 To get the height of Fujinoyama we tlnii aild 



^ 



