Sciatherical

Here I ought to mention the Sciatherical Instruments, for Want of which there was a Time when the Grecians themselves were forced to measure the Shadow, in order to know the Hour of the Day.

Source: wiktionary

[The cromlech] could not be primarily intended either as a Religious Structure, or a Sephulchral Monument, but was partly design'd for Sciatherical Purposes, and in general as the Apparatus of an ASTRONOMICAL OBSERVATORY.

Source: wiktionary

Here I may also mention the sciatherical instruments, for want of which there was a time when the Greeks themselves were obliged to measure the shadow, in order to know the hour[.]

Source: wiktionary

The Lumincus [sic] Lamp of Progression, whose sciatherical shadows falling upon earthly matter, not promoting sciolism, or Siccity, may it illumine humanity as it tardigradely floats from matter's aquius wastes, to minds majestic and apyrous climes.

Source: wiktionary