572 
[October, 
The Velocity of Light » 
B and C and D,” says Angstrom, who observed in high lati- 
tudes, during intense cold, that “ certain telluric rays ” 
disappeared, others became prominent (vapour rapidly ab- 
sorbed by the sea o. s. p.). He found “ A about 13 units 
broad,” — that is, 1-59*56 of its 760*4 (morning), and “ many 
of Frauenhofer’s rays are double rays.” 
H 2 and A are not the limits of darkness; the lengths of 
their waves are 393*3 : 760*4 = 1 : 1*9334, but the ratio of 
the limit lines identical with incipient darkness must be 
two. It is 2*000 — 1*9334 = 0*0667 and 0*0667^2 = 1-29*78, 
as all water-stuff of the mass of the atmosphere, and the 
change in solar distance, &c. 
The wave-lengths must have a cause ; there must exist a 
definite measure whose length represents a certain number 
of waves for white light as unity, and when broken up in all 
colours of the rainbow for these divisions. That measure 
can only be the mean height of the atmosphere. 
The ascending and descending water-stuff, in mass to air 
1 : 28*78, describes in the resisting medium between earth 
and atmosphere curves of every height, resting their 
branches on every basis up to a quadrant. The curves are 
parabolas having the sun for directrix, the vertex of the 
curve moving with the apparent position of the sun and the 
real position of the revolving earth and her strata. On the 
side of the earth towards the sun the attraction of sun and 
earth are opposed ; the sun carries matter from the earth ; 
on the other side the two masses join in bringing back lifted 
mass, the action of the sun being, however, weaker by 
greater distance. 
The air developes in itself centrifugality, tending to in- 
crease its height : this action, being a pressure against the 
sun on the day-side is opposed by his centrifugality ; the 
centrifugal portion of the air is forced to describe curves 
having their vertices towards the earth, the air becoming in 
itself divided in hyperbolas having their foci in the centres 
of sun and earth. On the night-side, when both attractions 
join, all the curves become parabolas,— water-stuff and the 
centrifugal 1^44*63 of the air tending more to descend, and 
the general air, as representative of the mean centrifugality 
of the earth or sea, to ascend ; warm air ascends when cold 
air and water-stuff descend. Where contention of sun and 
earth exceeds there is day, where coaClion exceeds is 
night.* 
* Meteors may become lighting outside the atmosphere, through increase 
of outside influences accelerating their translatory and rotary motion, and 
developing round them a liquidity and atmosphere of their own. 
