( 6 ? 7 ) 
of Men, and that it is frequently made ufe of for the 
taking of Films from the Eyes of Horfes and other 
Beads. I hear alfo that they fell good quantities of it 
to the Druggifts of Landon, but for what ufe I know 
not. This is all I could learn concerning Calamine. If 
I have omitted any thing wherein you are defirous of 
further Information ; or if in any other Concern of this 
Nature I can be ferviceable, you may freely command* 
Wrington , Tours, &C. 
CX5U5-84, 
VIII. An Arithmetical Paradox, concerning the 
Chances of Lotteries ? by the Honourable 
Francis Roberts* Eff r Fellow of the R. S. 
AS fome Truths (like the Axiomes of Geometry and 
Metaphyficks) are felf-evident at the firft View ? . 
io there are others no lefs certain in their Foundation*, 
that have a very different Afpeft, and without a ftrid: 
and careful Examination rather feem repugnant. 
We may find Inftances of this kind in moft Sci- 
ences. 
In Geometry > That a Body of an infinite Length may 
yet have but a finite Magnitude. 
In Geography, That it Antwerp) be due Eaft to Lon* 
don, for that reafon London cannot be Weft to Ant- 
werp. 
In Ajlronomy y That at the Barhadoes (and other pla- 
ces between the Line and Tropick) the Sun, part of the 
Year, comes twice. in a Morning to fome Points of the 
Compats, 
In 
