( ) 
oblique to the Horizon, along the Zodiac, and for 
that reafon call’d by the late Mr. Cajfmi the Zodi- 
acal Light. Mr. J. Childrey in hisHiftory of the 
Natural and Artificial Rarities of England, defcribes 
it thus. There is another thing which I mull needs 
recommend to the Obfervation of Mathematical Men, 
which is, that in February, and for a little before, 
and a little after that Month, as I have obferved fe- 
veral Years together about Six in the Evening, when 
the Twilight has almoft departed the Horizon, you 
lhallfee a plainly difcoverable Way of the Twilight, 
ftriking up towards the Pleiades , and feeming almoft 
to touch them. It is to be obferved any clear Night, 
but it is bell feen illuni NoBe. There is no fuch 
Way to be obferv'd at any other Time of the Year, that 
I can perceive, nor any other Way at that time to be 
perceived darting up elfewhere j and I believe it has 
been, and will be conftantly vifible at that Time 
of the Year. But what the Caufe of it in Nature 
fhould be, I cannot yet imagine, but leave it to far- 
ther Enquiry. 
Upon a farther and clofer Enquiry, and Confider- 
ationof this Matter, the ingenious Author, Mr. 
Mairan , tells us, he takes it to be the Solar Atmof- 
phere, and therefore treats at large of the Reality, 
Vifibility and Antiquity of this Light. 
I beg leave to tranfcribe the Accounts of the fame, 
given in by the Reverend Dr. Derham, Canon of 
JVindfor. He informs us, that about a Quarter of 
an Hour after Sun-fet, April 3, 1707, he perceived 
in the Weftern Parts of the Heavens a long llender 
Pyramidal Appearance, perpendicular to the Ho- 
rizon. The Bafe of this Pyramid he judged to be 
Kk the 
