( 347 ) 
and that not only in Sandy, but alfb in other Hills of firmer 
Earth 3 of which I have feen my felf pretty big pieces. Concern- 
ing Swallows have frequently heard F idler -men affirm,that they 
have here often fiftfd them out of the Lakes, in the Winter 3 but 
I never have feen it my felf. Whilft I am writing this , I receive 
Letters out of Denmark^ , advertifing me, that thofe two Learned 
men;, Thomas and Erafmus Bartholin , do intend fhortly to anfwer 
the fame Queries, Next Winter, if Cod vouch fafe me life and 
healthj purpofe to make a Journey to Konigs-herg, where I hope 
to learn many things, efpecially about Amber. 
Thus far in anjwer to thofe Inquiries for theprefent. 
To this he fubjoyns other things, no lefs fit to be communica- 
ted to the Curious, in thefe words 3 
The Books you have lent me over fea,I have not yet received: 
I with , they were all tranflated into Latin 3 for 1 have not En« 
glifj enough, to underftand all particulars perfeftly. For the reft, 
you have obliged me,by communicating the Obfervations of the 
lad Eclipfe of the Sun , afwell thofe made in England , as thofe of 
Paris and Madrid . That I may requite you in feme meafure, I 
fend you my Obfervations both of that , and the Moons laffc E- 
clipfe. In the Suns Eclipfe 0 this is chiefly obfervable , That the 
Semidiameter of the Moon from the very beginning, to about 5, 
or 6. digits of the increafing Phafs was much lefs than the Ru~ 
dolphin Account imports. For it was then almoft equal to the Se- 
midiameter of the Sun : but, after the greateft Obfeuration,when 
I again contemplated the Moons Semidiameter 0 \ found it 8" or 9" 
bigger than that of the Sun 3 fo that the Semidiameter of the 
Moon was not always, during this Eclipfe, conftant to it felf. It 
will therefore be worth while, to be hereafter more diligent and 
curious in this particular, and accurately to obfeive in the Phafs 
of each Digit the Proportion of the Semidiameters of both Lumi- 
naries 3 to the end, that firfl it may be made manifeft , Whether 
in all the Eclipfe s of the Sun , or in feme only, that variation hap- 
pens 3 nexf that the Caufes of fuch a Phenomenon may be dili- 
gently inquired into. Of this Variation, the Excellent Ifmdel Bui - 
lialdus hath alfo obferved fomething at Paris. For he has written 
to me. That in the fame Eclipfe the Semi di am. of the Sun to the 
Semid . of the Moon was, as i6'.f '.to i6 r . 22" ^ but that in another 
Z z * 2 Phafs 
