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# Title: Leibniz-Handschriften zur Optik und Dioptrik LH 37, 2
# Folio 60r, page id 00068531:0119
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tey
they cannot
Cpace, and consequently  add any chinu lo che
Burninu Force. : t. I.
Ao is easy eo apply ihis Solution 1o all Kinds
os Burminu Glasses Wohether Plano- Conveae oith
Ther Convea Sides expos d 10 the Sun, or D ouble
Conveae (or iohich os all others beur che largest
Drameters) Plano-Convea combind oith a Meniscus
of proper exhaeres:  have omilted the Demonotra
because
tion ib is pretty obvious by the Diagram 10 chose
vell
thab are  acquuinted oith chis art of Optictes
and cannot be mude plain lo others rouhout che
Demonstration of Severall other Propositions, (100
many 1o be here inserted) of iohich inis is ontga
But,
Oorollary. Sshall communicate che iohole in g00d
time, and apply the Propositions 10 determine che
Apertures and Gharges, nhich the best Felescopes,
their
(accordinu to  Severall uses) phal require
Athall orly Add that all Lenses of Equall segments
tho of different in
Ophoeres egually Elluminalo ctre Objects placd
in cheir dislinit Bases: but to say thas chey Burn
roith equall F’orce is t00 great a Parados: aud
yet d cannol forbear to chinte chal l ight aud
Fleat are allivais Proportionall. Phal Therefore
leave che Determination of chis difficulty lo future
Iryallo.
P. S. In Figure 2. The Solution is applyd 10 a
Concuve Speculum: rohich benus brought to a
Calculation, A C Cr, vill be found an Angle of.
aboul 22. aud consequently a Cr = A F, C, 24 
aud A F, A, 4. 8.
Nay 25. Figure T. A F, A. 2L. 50.
Figure 3. A F, A. 2.F. 4.D.
C.
Feb. c
27C
2704