Description: ESSAYS ON THE MICROSCOPE; CONTAINING A PRACTICAL DESCRIPTION OF THE MOST IMPROVED MICROSCOPES: A GENERAL HISTORY of INSECTS, THEIR TRANSFORMATIONS, PECULIAR HABITS, AND ŒCONOMY, AN ACCOUNT OF THE VARIOUS SPECIES AND SINGULAR PROPERTIES OF THE HYDRÆ AND VORTICELLÆ: 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. LONDON: PRINTED FOR THE AUTHOR, BY ROBERT HINDMARSH, PRINTER TO HIS ROYAL HIGHNESS THE PRINCE OF WALES, No. 32, CLERKENWELL-CLOSE; AND SOLD BY THE AUTHOR, AT HIS SHOP, TYCHO BRAHE´S HEAD, No. 60, FLEET-STREET. M. DCC. LXXXVII.