Essays on the microscope [electronic resource] : 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. By George Adams, mathematical instrument maker to His Majesty, and optician to His Royal Highness the Prince of Wales.