Memoirs of the life of David Rittenhouse, LLD. F.R.S., late president of the American Philosophical Society, &c. : $b interspersed with various notices of many distinguished men : with an appendix, containing sundry philosophical and other papers, most of which have not hitherto been publishedBarton, William
History
Memoirs of the life of David Rittenhouse, LLD. F.R.S., late president of the American Philosophical Society, &c. : $b interspersed with various notices of many distinguished men : with an appendix, containing sundry philosophical and other papers, most of which have not hitherto been published
bonarumque artium patrono, imprimis astronomiæ, faventissimo, Londino
evocatus in Germaniam me conferrem, ubi amplissimæ splendidissimæ
Speculæ, Astronomicæ Gothanæ extruendæ cura mihi demandata erat;[90]
attuli eodem hoc tempore, ad Serenissimi mandatum, minoris molis
horologium, quod in braccis gestari solet (Anglis, Pocket-chronometer,)
a Londiniensi artifice, D. Josiah Emery,[91] constructum, quod summâ
accuratione et subtilitate elaboratum, nil majoribus cedit horologiis
nauticis, ut videre licet ex tribus horum motuum elenchis ab Ilustr.
Comite de Bruhl, et â aliorum Dr. Arnold, nuperrime publici juris
factis. Sub finem anni 1786 et ad initium 1787, Serenissimum in itenere
per Germaniam, Galliam, et Italiam, comitatus sum: hoc itenere quorundam
locorum et Specularum astronomicarum longitudines definitæ sunt ex
comparatione temporis horologii maritimi (quod ad tempus solare medium
Londinense, in Doverstreet incedebat) cum tempore medio loci, quod
sextante Hadleianâ per solis altitudines, quas correspondentes dicimus,
vel ex comparatione cum illo, quod in Speculis Astronomicis ab ipsis
astronomis traditum nobis fuit. Iisdem itaque automatis, cum primum
Gotham advenissem, observatorii futuri longitudinem maximâ cum curâ
atque diligentiâ definivi, quam paucis post diebus Serenissimus Dux
Londinum profectus, chronometro suo secum deportato denuo perbelle
comprobaverat.”
-----
Footnote 86:
Philip III. king of Spain, first offered a reward for the discovery of
the longitude, about two centuries ago; and the States of Holland,
soon after, followed his example. The Regent of France, during the
minority of Louis XV. also promised a great reward to any person who
should discover the longitude at sea.
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