1884.1 
Observations of the Greeley Expedition. 
637 
to —i*666° C., and was 2° F. warmer than at Cape Sabine, 
where the tide flowed from the south, and therefore averaged 
5 0 F. below freezing-point, equal to —2*77° C. 
The figure i*666, and the temperature i*666°, and its 
negative — 1*666° occur so often in the volume named that I 
shall only quote passages bearing more immediately on the 
apparently anomalous phenomena observed. 
Pages 10, 11. — “ The direction of the Isorachis is deter- 
mined not only by the size of the oceans and the width of 
the channels, but also by those streams with whose motion 
the influences of moon and sun combine.” “ In the Arctic 
sea the tide goes north where the stream enters, south where 
it leaves.” 
Page 97. — “ The average temperature of an upper 1*41' 
thick layer of the earth is 20° C. ; the vapour leaves it at 
20°: that of the equally thick sublayer is — 
20°+ 1*666° — o*43°.” 
Page 98. — “ Ocean water has a greater capacity for heat 
than water ; it requires a higher temperature to boil and a 
lower one to freeze ; it changes its nature by evaporation 
and by freezing ; it is diminished by the salts in the first 
case, and dismisses them in the other : these changes set in 
at i*666° and — i*666° C. 
Page 99. — “ The ocean must have an own temperature of 
1*666° C., and an upper layer of the land will also have an 
own temperature of i*666°.” 
Page 177. — The Earth, as it is, is part of the Solar system. 
It has in its outside layer, to the depth of 15,180 feet, an 
own temperature of i*666°, which is the product of its growth, 
and a temperature which is the product of the continuous 
adtion of solar gravity on the gravity of the Earth.” 
Page 209. — The mean temperature at the bottom of the 
sea is i'666° C.” 
Page 1 13. — “ Ocean water has qualities playing an im- 
portant part in the distribution of temperature ; it does not 
only yield, it also absorbs vapour, and prevents local ex- 
cesses of heat, rain, and freezing ; it maintains its circu- 
lation.” 
Page 194. — “The vapour absorbed by the sea being 
S’87 , - 4 -3'83 = 8*87 , -6*56' = 2*3 / of water, the 1 4-1713 0 f the 
sweet sea (or 78*07 inches out of the 106*49") return as rain, 
snow, hail, fog, dew, and hoar frost. The 2*31' = 27*7"' ab- 
sorbed by the sea, beyond 30° of latitude, and principally 
in the highest latitudes and polar regions, maintain its 
temperature in the midst of the winter at — 1*666° in those 
