Astronomy.

tits.

8^' to Beginning of Capricorn, thet}< appear from the Earth to move

g ll S h the opposite Signs of the Ecliptic,•driesy Taurus, Gemini, to the Begin-ning

vay 0 nnd the Expression of the Winter Tropicalth ^ ave the Semi-diurnal Arch2 — 57 °> a pd they/ atne a s before. Therefore ■

Th logarithm of Sine - —

• m, e Logarithm of.-

6 Logarithm of-

2 - 57° - r-7558750-01745 - 8.241795ad- — 9.494244

T -—

the Logarithm of adz— 0,3104 = 9.491914th %br^ .. J~-„»QQ _.0 OTCM = 0.1684, and

,2 v ” ‘ adz — 0,4788 — 0,3104 = 0,1684, andp‘ G h’i s 1 1^84 = 0,3368 = Heat of the whole Day>v • almost 7 times less than that of the Summer

%

'Pic.

is ^ 7 - T

{jj gw e of the Heat of the two Tropical Days^^Cat 0,3368 = 2,634 ; which is greater thann’ 5 - 9 . j?* two Equinoctial Days with us, which is butby .means of the Obliquity of the Ec'‘ L "' T '—have much mor

u b y meansor ^ i-v -

the $ ,tvho live beyond the Tropic have much more

to* t'ov* 1 ? ^ eat tilan we cou ^ ^ ave en j 0 )'^ ^ ad t}ie

h r ha 7 always .in the Equinoctial. And on the

t>.st ’ .' l * w ‘h he found by Calculation, that for

0 live between the Tropics and the Equator,

lh!? r It C ^ e Beat of any two opposite Days 0 f the

t, ^ thef e c s than the Heat of two Equinoctial Days;

C°s Q t ^' e Beat of the whole'Year is less in the

S 3 e > than it would be from a constant Equi-

28 r Un -2 dEastk,

8 jy » mt it t,e requucu ^ —,— ...

bi' In or that under the Pole, for the Tropical

a 3e ^ce th e l {p a ^ e ^~ =0 ’ an ^ x &~ x ^ c -t- 0 ’ a ^° a ~ x *' ! He

tt/r }y let it be required to calculate the Pleat ofa A or that und“- 4 ‘ be ‘ for the Tropicaland .y gzrxec — u -, anu « — *..° r Beat-of-ariy Day under the Pole will be;as

* ^tii e C °^Jhe Declination, because z is ssere alwaysr n ’ v >z, -> c—r8n Deo-rees.' And un-

V s the'p V , !Z ' a Semicircle, or 180 Degrees. ....

- f °Pical Su tlle ^ a * ue of 4 z is th.us expressed for the

/ rrl,^

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