Essays on the microscope : containing a practical description of the most improved microscopes : a general history of insects, their transformations, peculiar habits, and oeconomy : an account of the various species and singular properties of the Hydrae and Vorticellae: a description of three hundred and seventy-nine animalcula, with a concise catalogue of interesting objects : a view of the organization of timber, and the configuration of salts when under the microscope /