Ankographia [sic], sive convallium descriptio. In which are briefly but fully expounded the origine, course and insertion; extent, elevation and congruity of all the valleys and hills, brooks and rivers, (as an explanation of a new philosophico-chorographical chart) of East-Kent. Occasionally are interspers'd some transient remarks that relate to the natural history of the country, and to the military marks and signs of Cæsar's rout thro it, to his decisive battle in Kent ... / by Christopher Packe, M.D.

  • Packe, Christopher, 1686-1749.
Date:
1743
Catalogue details

Licence: Public Domain Mark

Credit: Ankographia [sic], sive convallium descriptio. In which are briefly but fully expounded the origine, course and insertion; extent, elevation and congruity of all the valleys and hills, brooks and rivers, (as an explanation of a new philosophico-chorographical chart) of East-Kent. Occasionally are interspers'd some transient remarks that relate to the natural history of the country, and to the military marks and signs of Cæsar's rout thro it, to his decisive battle in Kent ... / by Christopher Packe, M.D. Source: Wellcome Collection.

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    J>y the B«romcHt\ X y Sarometical Experiments* hue From the Low*water mark at the Sea, and Relative to one another between any two given places. in this bu fine (s I employ’d two accurate Upright Barome¬ ters, both made by the lame hand, upon the fame Con- ftrudtion: one 1 fix’d in a conftant place in myhoufe* the other, made into a more Convenient form for Carriage, l took with me in my Journeys. Their Tubes are pretty large, being ~ of an inch diameter within; and they are both of * them equipp’d, befides the common Scale of Inches and Tenths, with a Hiding Nonius Scale and a Microfcope ; which divides each tenth of the Inches into ten other parts, /. e. into hundredths, by the coincidence of fome or other of it’s lines with one of the tenths of the common Scale; higher or Lower according as the Glafs directs you to let the Index exactly to the edge or top of the Collumn of Mercury in the Tube. This is in a few words their Conftrudlion ; their Ufe follows. Much Labour and Judgment have been bellowed by many curious Enquirers in diverfe parts of the World, in order to afeertain the Quantity of perpendicular heights that corref- ponds with thefeveral Elevations and Depreffions of the Mer¬ cury in the Barometer: but the amount of their Experiments differs more than one would expedl from fuch judicious and faithful Philofophers. Mariotte, CaJJini, and more particu¬ larly the Scheuzers, who have taken immenfe pains to deter¬ mine the height of diverfe Mountains above the Level of the Sea, vary very much in their Altitudes. And, to be a little more particular, Dereham for the Monument at London gives to each tenth of an inch 82 perpendicular feet; Nettleton for fome hills in Yorkfnire 85 ; M, De la Hire for the top of the great Hall of the Obfervatory in Paris 89 ~ ; Mr. Halley for Snowdon Hill in Wales 90, all Englifh: and Celfiui for the depth of a Mine near Upfall ioj, and for the height