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I think The Mathematical Jewel (1585) was his most popular and influential publication. The “Jewel” of the title was an astrolabe designed by Blagrave and considered superior for its time. The title page (shown above) proclaims the book’s contents:
The mathematical ievvel, shewing the making, and most excellent vse of a singuler instrument so called: in that it performeth with wonderfull dexteritie, whatsoeuer is to be done, either by quadrant, ship, circle, cylinder, ring, dyall, horoscope, astrolabe, sphere, globe, or any such like heretofore deuised: ...
Answer:
Explanation:
Talking to the Text (TttT) is a Reading Apprenticeship® (RA) routine that helps the reader learn how to figure out the meaning of text based on his or her schema, paying attention to the text, and by focusing on his or her metacognitive processes as the reader reads on to make meaning of the text.
Do a ratio dude:
12.2 19.5
------- = ------
200 x
Solve, and you get that x is approx equal to 320 mg.
