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# Title: Leibniz-Handschriften zur Technica LH 38
# Folio 21r, page id 00068537:0041
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problemata Hydrographica nova.
(1) pyxides Nauticas fabricare, ita grandes, ut ipsa minuta
secunda in iis possint distincte observari
magnetica.
Hoc fiet, si a stylus vel semidiameter pyxidis ab acu circumagendus sit
satis longus. Sed quanto erit longior, tanto erit gravior, ac proinde
difficilius ab acu circumagetur. Necesse est ergo rationem quandam
haberi fortificandi acum ut onu solito majus movere possit.
quod fiet per problem. sequens.
2) Acum nauticam quantum satis est fortificare
viribus ejus decuplicatis, imo, si opus, centuplicatis.
armandi
Hoc fict nova
quadam certa sucilique ratione hactenus non obserata, multo minus adhibita.
Cujus usus magni adrem nauticam momenti esse potest. est, tum ad inclinationes
tum ad declinationes exacte observandas
Latitudinem loci seu Elevationem Toli sine coelo et stellis exacte
invenire.
Hoc fiet prxide inclinatoria seu ad horizontem perpendiculari aque
per probbm. B..
satis grandi, ut ad minuta usque secunda subdividi possit. Ita
minutis secundisque.
ex gradibus inclinationis determinabuntur gradus minuta et secunda eleva
tionis Doli. Sed quia proportio inclinationis et dlevationis est difformis
(nam v.g. observatum est elevationem Poli ut 30. habere inclinationem acu
ut 60 et elevationem Poli ut 35. habere inclinationem acus ut, 63. etc.)
ideo opus est Globo Artificiali, qui si satis grandis, exacteque subdi-
visus fit et meridiano mobili, exacte adminuta usque secunda sub.
diviso instructo sit; poterit sine ulla calculatione exacte ad usum
inveniri, quis gradus elevationis, quem det gradum inclinationis.
sigum nimis conperfestarem
deduci non potuit, quia ob debilitatem acuum, praides satis grandes
satisque exacte sub divisae fieri non potuere
dursum navis in globo artificiali exacte delinearet, nulta alia coelesti
observatione adhibita Declinationibus tantum Magnetis subinde obser
vatis.
quotiescunque cursus non fit in eodem pracise Parallelo.
Lum detur Cyxide imlinutrin exa exacte subdirisa satisque grandi, detur minimum
Cminimun
de miliari in miliare inclinationis untatis, ac proinde mutatie
Detur primum punctum discessus cognitum enque globo artificiali notatum esse