Matches in Harvard for { ?s ?p Dr. Gregory's elements of catoptrics and dioptrics. To which is added, I. A method for finding the foci of all specula as well as lens's universally. As also for magnifying or lessening a given object by a given speculum or lens in any assign'd proportion, &c. II. A solution of those problems which are left undemonstrated. III. A particular account of microscopes and telescopes, from Mr. Huygens. With an introduction shewing the discoveries made by catoptrics and dioptrics. By W. Browne, A.M. & med. prac.. }
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- catalog title "Dr. Gregory's elements of catoptrics and dioptrics. To which is added, I. A method for finding the foci of all specula as well as lens's universally. As also for magnifying or lessening a given object by a given speculum or lens in any assign'd proportion, &c. II. A solution of those problems which are left undemonstrated. III. A particular account of microscopes and telescopes, from Mr. Huygens. With an introduction shewing the discoveries made by catoptrics and dioptrics. By W. Browne, A.M. & med. prac.".