Tnflrutnents for the purpofe, 1 «K)uld not exactly fct oft 
their delincationsj nor their diftaoces from the Suns Ymby 
but was fore d to reprefent them only as well as ! coiildv 
by taking the fpecies of the Sun upon Paper through, a Tc- 
kfcope, and fo- marking out their places* 
But fince the laft appearance of the Spots^ I have iavent- 
ed, and have provided my felf with an: exceeding mc^ 
Micrometer, and a Watch that beateth half Seconds, ho^ 
pifig to have been able to have feeo anocher, P^evoiuiioa of 
them*. 
My Microroetef is not as ufuallyg to be put into a- Tabe^.. 
b*ut is to meafure the fpecies of the Sun on Paper fofany 
Radius) or to meafure my part of it, which i am inclinU 
to. think is more, cxad than the common '.vay." By thk 
means i can eafiJy, and very exa(Sly, v^/kh the heipof a 
fine thread, ti^ke t!ie dechnatioa of a Spot at any time of 
the day 3 and by my half Seconds Watch, and. a fine crofr 
hair (which latter way I learnt from my Friend Mr FUm^ 
fiead) I can tneafure tlie diftance of the Spot from the Sun%. 
Eaftern or Weftern Limb. 
This crofs fine Hair^^ I advife, from my own experience, 
fhould be fet, not at the exact iocal diftance from theEye» 
Glafs (as ufually 1 but a little out of that diftance, nearer 
towards the Objeft- Glafs, becaufe the fliadoW of the Hair 
will be thereby much narrower, and more ftrougly appear 
cro(s the fpecies of the bun received on the Paper, which! 
take this occafion to note, not only becaufe 1 beiiere it hath 
fcarcelyever been before obferv*d, but becaufe it may be 
of good ufe in taking the Suns altitude, meafuring his dia- 
meter, this being a more eafy, and perhaps a more cx:- 
aft way, than by looking through the Tube. 
Being thus provided, if I could have feen another Pvevolu- 
tion of the Suns Spots, I (hould have been able to have given 
the Society a more accurate Account of their Pofition and 
Motion. But I hope it hath been done by fome others, and 
thattheirmoreaccurate Account may render this of mine 
Yyyyyyyy lUk 
