JB/135/061/002

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De Chales tells us in The Use of 35" Prop
Book 3d that "we are taught by this proposition"
"a method of finding a fourth proportional to three" Use of Propositions
"lines given, at a third Proportional to two".

Quere — in practice supposing any one wanted
to find either of such proportionals would he
do it by these means? probably there is or may be
some such rule as the Rule of three to answer all these purposes
and if so why not do it by such rule as by this Prop. seeing both media are demonstrable
truths
Simpson in the 34 Prop Book the first
finds it necessary to make use of the term Definitions
Misplaced
Parallelogram and for once it bethinks him
that shortsuch a term shouldought to be defined, what then
he must be done with this definition
his full of the persuasion of the all-sufficiency
of Euclid's definision he dared no to
insert it at the beginning if its proper
place among other definitions. No, he
must rather come to stuff it in under the
mark of JB. that profane it might go unobserved as a new definition No wishing to give it to
assist the learner yet thing to
[to view the necessity there was for it.] the imperfection
of the teacher.

One of the first 3 books of lgous Euclid could
not say with a member of a certain Comparation
We have done a world and all of things for
Posterity but I never heard that posterity
had ever done any thing for us. The the 3d
book could not say for the lat is obliged to

Identifier: | JB/135/061/002 "JB/" can not be assigned to a declared number type with value 135.
Date_1		Marginal Summary Numbering	not numbered
Box	135	Main Headings
Folio number	061	Info in main headings field	geometry
Image	002	Titles
Category	copy/fair copy sheet	Number of Pages	4
Recto/Verso	recto	Page Numbering
Penner	sir samuel bentham	Watermarks	[[watermarks::gr [with crown] [britannia motif]]]
Marginals	sir samuel bentham	Paper Producer
Corrections		Paper Produced in Year
Notes public		ID Number	46179
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