Ioannis Friderici Weidleri institutiones astronomiae selectis observationum et calculorum exemplis illustratae
A Latin astronomy textbook by Johann Friedrich Weidler, published in 1754 in Germany by Samuel Godofred Zimmermann, written for students learning observation and calculation methods. Its pictures are engraved plates of geometric diagrams, showing circles, orbits and angle constructions with labelled letters and dotted construction lines, which a designer could draw on for precise technical linework and historical scientific diagram layouts.
