(7*P) 
doe, if fetied in thefe Tubes j having no need of them, I reft as I s 
am. Now I (hould be heartily glad, if any of my friends flxmld 
receive any aid or eafe by fuch an obvious device (containing no- 
thing but emptinefs and darknefs) as this is. And probably they 
may be more proper for fome that are [quint-eyed, whofe eyes 
doe interfere, and fo make the objed, as if you would write one 
line upon another, where, though both (hould be ever fo fairly 
written, yet neither will be eafily legible. Here Squint-eyes will 
be kept in peace, and at fair Law. Certainly it will eafe them, 
that cannot well bear the light * and perchance it will preferve the 
fight for longer durance. If i\T. N. fliould find thebenefic, as I 
do,, he may thank you for the information, &c. 
An Extract 
of Another Letter from the fame hand, conpmingthe contents of 
the former; and adding fome other obfervathns about Sight. 
THere is more worth in that flight notice, which Ifent you 
laft, than any one, that hath not the defeft, which I have, 
Will eafily imagine. And perhaps no man will have the patience 
to endure to ufe it, but he, that is in a like cafe of neceflity and 
diftrefs as 1 am. I praife God for it, I fee now by this trifle (thefe 
Taper- tubes ) as well as the youngeft in my Family, and can read 
through them the fmalleft and blindeft Prints, as ever I could 
from my childhood, though my fight be almoft loft. And having 
ufed thefe empty holes for Spe&acLes little more than a week, , 
lean now life them without trouble all the day long $ and I veri- 
ly believe, that by this little ufe of them, my fight already is 
much amended. For I do now fee the Greenefs of the Garden, 
and Paftures in a fl&id verdure, whereas very lately dark colours^ 
blue, and greeny had the fame hue to my eye. 
If you ask me., how this- device came in my head, I ftiall tell 
you all I do know. Some years agoe I was framing one oiHeve- 
liw s Polemofcofes : As I was trying the Tube, without the Di~ 
optrick Giaifes* I perceived, that, though the Tube took m * 
very little, and feem'd fcarceferviceable for any confiderablepur- 
pofe 5 yet the obje<& appear'd to me more diftinft-and cleatc 
through the Tube, than through the open Air. This IfeftlKARfij* 
LIU 3 aai. 
