lement of the latitude, ib the fame extent (hallreach from the tangent of the houre, to the tangent of thehoure-line from the meridian. Thus in the latitude of 51 gr 50 m. I extend the comparesfrom the fine ofpo^r.to the fine of l$gr.icm. and find thefame extent to reach from the tangent of i$gr.… … Thefe arks being known e, I may come to the plane, andthere by help of a thread and plummet draw a verticall line o 2 feruing 108 The %ftrifth* $ja <vtttiuU inclining Plane. fettling both fftthe meridian and the houre of 12, and thefubftylar $ th£h may I draw an occult vertical! circle,…
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![An illustration from Mundus subterraneus, in XII libros digestus : qvo divinum subterrestris mundi opificium, mira ergasteriorum naturae in eo distributio, verbo [pantamorphon] Protei regnum, universae denique naturae majestas & divitiae summa rerum varietate exponuntur, abditorum effectuum causae acri indagine inquistae demonstrantur, cognitae per artis & naturae conjugium ad humanae vitae necessarium usum vario experimentorum apparata, necnon novo modo & ratione applicantur. Ad Alexandrum VII. pont. opt. max. (1678)](https://img.insideoutlibrary.com/img/200/ia-mundussubterrane02kirc-64-74.webp)
