MICROSCOPE. 



Micncco- would be obtained for very dark object*, or for high 

 pic object*, powers ; and by (hutting up one or more of the four 



"""' lenses, or parts of them, we should be enabled to find 



the particular direction of the light which is best suited 

 for developing the structure, which it is the object of 

 the observer to discover. 



CHAP. V. 



On i:i ;crc- 

 copicob- 

 jteu. 



On Microtcopic Object*. 



: every object in nature may be considered as 

 an object fit for the microscope, either as a whole, if it 

 is small, or in its parts, if it has considerable magni- 

 tude. The name of microscopic objects however, is 

 generally given to those minute animals which cannot 

 Be seen without the microscope, or to particular struc- 

 tures in the animal, vegetable, and mineral kingdom, 

 which are remarkable for their beauty when examined 

 by the microscope. 



In our article Axiv u.iTi.r, vol. II. p. 134, we have 

 already entered into great detail respecting the mo.-t in- 

 teresting aniraaU which have been discovered by the 

 microscope, and have represented some of the most im- 

 portant in Plates XXIII and XXIV. Weshall there- 

 Wt confine our-. K, < lit ]>rc-. i:t to n brief enumeration 

 of microscopic object* which posses* a particular in- 

 terest. 



Lit! of the mott interfiling Microtcopic Objecti. 

 imakukt. 



, or poU i in stagnant water. 



Ann ,-d. 



Do. i <xxl, urine, and other animal 



flu 



in fetid sea-water, 

 in infusions of grass and hay. 

 in dunghill water. 



in infusions of pepper, coriander seeds, and 

 cassia, and in the juice of the beet root, &c. 

 in an int'tiMim of the loachvt arirnti*. 

 in water where duckweed grows, 

 in yellow ochry slime that covers pooh of 



standing wa- 

 Ei N found in paste. 



in vinegar, 

 in salt wa- 

 in blighted wheat. 



The animalcules are generally found in the film or 

 pellicle which covers the surface of infilled liquors. It 

 tt sometimes necessary to dilute the infusions, which 

 should always be done with distilled water, and the 

 water should be previously examined in the microscope. 

 The animalcules are commonly een best when the wa- 

 ter is a little evaporated. 



II. I meet*. 



The common spider, the flea, the bug, mites of a 

 cheese, the gnat, the common louse, the crab-louse, 

 the pigeon-louse, Uw cattle-louse, the sheep-louse or 

 The death-watch of Linnsros. The podura viri- 

 duand aqtiatica, found on the leaves of plants. I h 

 rose-chaffer, the flea-beetle, the water-flea, the lady-cow 

 or lady-bird, various species of the genera 



Do. 



Do. 



Do. 

 Do. 

 Do. 



Chrysomela,'Cureulio, Gryllut, Cicada, Cimejc, Aphis, and Microse*. 

 Cnermet. The water-scorpion, the mole-cricket, the picobjecu. 

 glow-worm, the earwig. '""Y"* 1 *' 



The LEHIDOPTEROUS insects of the genera Papilio, 

 Sphinx, and Phahrna, are interesting from their wings, 

 scales, feathers, proboscis, head, eyes, antenna?, chry- 

 salides, eggs, legs, &c. 



The NEUROPTEROUS insects of the genera Libellula, 

 Ephemera, Phryganea, &c. from their head, wings, 

 eyes and antenna?. 



III. Partt of Animalt. 



Wings, and legs, and eyes, of flies and other animals. 

 Scales of fishes. Antennx of moths and butterflies. 

 The hair and bristles of animals. 

 Globules and circulation of the blood. 



Skins 6 "} Pith of *' feathers Cllt transversely. 



IV. Partt of Plant*. 



Section of the trunk and roots. The rhind. 



The seeds of plants. The blea. 



The stamina. 



The pistil. The leaves and their fibres. 



The receptacle. The pertcarpium. 



V. Section* of Plant*. 



The following i a list of the vegetable sections which 

 were made by Mr. Custance, by means of a machine 

 which lias been described in the Phil. Mae. vol. iii. 

 p. 302. by Dr. Thornton. 



English oak. Evergreen, do. 



Norway oak. Ash. 



Cedar. Cork. 



Savin. Fir. 



Ceanothus. Hazel. 



Lime. Elm. 



Elm root. Mulberry, do. 



Grape-root Lime, do. 



Beech. Kirch. 



Plum. Ivy. 



Spanish elder. American climber. 



Cluampelos. Virgin's bower. 



Magnolia grandiflora. Golden row. 



Althza frutcx. Tulip tree. 



Spanish chetnut 



Platan in oriental U. Viburnum lantana. 



Oak-root. Ash- root 



Asp-root. Walnut, do. 



Grape vine. Indian turpelh. 



China root Jasmine. 



Dog-rose. Raspberry. 



Try. llriar. 



Elder-root. Ditto, branch. 

 Willow-root. Ditto, branch. 

 Mulberry. 

 Sycamore. Maple. 

 American dogwood. Ptclea trifoliata. 

 Ligneous night shade. Sumach. 

 Apricot. Medlar. 

 Bay. Laurel. 



Sea- weed. Longitudinal cutting of plane tree. 

 Ditto of Spanish elder. Ditto of briar. 

 Common cane. Ditto with curious centre. 

 Bamboo cane. Sarsaparilla. 

 Longitudinal cuttings of sugar-cane. Elder. 







