Microscopic view of assorted glass canes and drops

Engravings from Schem. 4 of the first edition of Robert Hooke's seminal volume, Micrographia : or, Some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon. Depicted here are an assortment of small glass canes, or pipes, and glass drops that are the subject of Hooke's experiments in Observations VI and VII.