. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. 8 PRACTICAL TKEATISE ON as because that light itself is a heterogeneous mixture of dif- ferently refrangible ; Having constructed a telescope on the reflecting principle, Newton was soon led to apply the same principles to the microscope, and we find that m^ the year 1672 he invented the first compound reflecting micro- scope, since so greatly improved by Amici, Cuthbert, and Dr. Goring. Newton also suggest
. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. 8 PRACTICAL TKEATISE ON as because that light itself is a heterogeneous mixture of dif- ferently refrangible ; Having constructed a telescope on the reflecting principle, Newton was soon led to apply the same principles to the microscope, and we find that m^ the year 1672 he invented the first compound reflecting micro- scope, since so greatly improved by Amici, Cuthbert, and Dr. Goring. Newton also suggested that the compound refracting microscope would be rendered more perfect "if the object to be viewed were illuminated in a darkened room by light of any convenient colour not too much com- pounded;" in fact, monochromatic hght. In the year 1698, Philip Bonnani, in his work entitled Observationes circa viventia, quae in Rebus non viventibus repe- riunfur, describes a compound microscope in use by him. This microscope, which is represented by fig. 4, was placed. Fig. 4. on a stand in the horizontal position, and was provided with a stage for the objects; and, with a coarse and fine adjustment to the compound body, the former was obtained by means of a rack and pinion, which moved the entire frame-work, supporting the compound body, whilst the latter was efiected by a screw in the end of the body itself near to the object glass; and to steady the opposite end of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Quekett, John, 1815-1861. London, H. Bailliere; [etc. , etc. ]
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