[ 162 3 
Royal Academy, and has an Englifh micrometer ; 
having a moveable wheel, and divided into minutes; 
and by means of a fcrew to the index of the qua- 
drant, together with the divifion of the nonnius plate 
fattened to it, was fo applied, that during the whole 
time of the ohfervation, while the wire of the plum- 
met conftantly glided upon the fame point of the 
limb, it might be moved in the limb by a vertical 
motion in either direction by the alidad alone. This 
mott excellent invention of your’s I firtt brought in- 
to Germany, to the bett of my knowlege, after I had 
feen it’s power at Paris in the hands of the ingeni- 
ous M. Le Monier. 
Eefides the quadrant, Dollond’s telefcope, and fe- 
veral other attronomical tubes of 6, 8, 13, and 22 
feet ; v/e had a Newtonian telefcope of 4 feet Auttrian 
meafure, with an eye glafs of 4- of an inch. 
We had a clock made by M. le Paute, a Parifian, 
very well defended from the rays of the Sun and from 
the" wind, which I accommodated to this bufinefs 
for a month before, in many celcftial obfervations 
with as much accuracy as I could, and with more 
fuccefs than we could well expeett. 
The interior contact of the wettern' 
limb of Venus, with the wettern 
limb of the Sun, obferved with Dol- 
lond’s telefcope — — 
The moment of the egrefs, wherein the 
fame limb of the Sun after the inte- / 
True time. 
h 
/ // 
20 53 8 
rior contact firtt appeared cornicu- 1 20 53 35 
lated, mott accurately obferved with 
the fame telefcope, was — — 
Whence I conclude, that the interior 
contact happened — 
a As 
} 
20 53 33 x 
