(* 5 ) 
much of the Language wherein I have written, as to un- 
derftand all what was faid by me, or, that, he had notread 
my Dedication to the Royal Society , which if he had done, 
he would have found, how careful I was, that that Illujlrious 
Society fhould not be prejudiced by my Errors, that could be 
fo little advantaged by ray Actions. And indeed, for any man 
:o look upon the matters publiihed by their Order or Licence, 
as if they were 'Their Senfe, and had Their Approbation, as cer- 
tain and true , ’tis extremely wide of their intentions, feeing they, 
in giving way to, or encouraging fuch publications, aim chiefly 
at thiSj.that ingenious conceptions, and important philofophical mat* 
maybe communicated to the learned and enquiring 
^orld, thereby to excite the minds of men to the examination 
and improvement thereof. But, to return j As to his Objections 
againft the Matter fi do find that they are no more againft mine, 
than any other way of Grinding Glajfes i nor is it more than L 
have taken notice of my felf in this PalFage of the fame Para- 
graph, of which fort are alfo thofe difficulties he raifes about 
Long Glajfes , which are commonly known to fuch, as are con- 
yerfant in making: them. It would be convenient alfo (thefe are my. 
words) and mt very chargeable, to have four or five feveralTools • 
One, Szc. And, if curiofity Jhall ever proceed [o farr, one for all 
lengths ^between loo©. and 10000. foot long $ for indeed, the Principle 
is fuch, that fuppofing the Mandrils well made y .and of a good lengthy 
and (uppofing great care be ufed in working and policing them, 1 fee 
no reafon, but that a Glaf of i ooo. nay,iQooo, foot longmaybe made , „ 
%s well as one of 10. For, the reafon is the fame, fuppofmgt he Mandrils 
and Tools be made fuffciently jlrong, fo that they cannot bmd - - and 
(uppofing alfo, that theGlafs out of which they are wrought, he capable, of 
fo great a regularity in- its parts, as t& its fe fraction. But next, I 
muft fay that his O-bjeCtions to me, feem not fo confiderablei as ; 
perhaps he imagines them. For, as to the poffibility of getting 
Plates of Glafs thick and broad enough without veins, I think 
that not now fo difficult here in England, where I believe is made 
as good, if not much better Glafs for Optical Experiments, than 
ever I law come from Venice. Next, though it were better,that 
the thickeft part of a long ObjeU-Glafs were exactly in the 
middle, yet I can allure Monfieur .Au^ut p that it may be a very 
