959 20585? I9999I30 198110699°$53 107 8 Hatiing thefe meancs to find the Sunnes azimuth,we maycompare it with the magneticall azimuth ^ and To findc thevariation of the needle. … For let the circle AMB, drawrte on the center Z, be aplane,parallell to the horizon; A the point whereon the Sunbeareth from vs, M the North point of the magneticall nee-dle, and the angle AZM the magneticall azimuth. If wefind the Sunnes azimuth as before,to be y2gr. $ 2 w.from theNortti rathe…
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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-133-101.webp)
