232 



MICROSCOPE. 



Microco- Rose-tree. 

 pic objects. Longitudinal slices of elder. 

 "~ y "" 1 " Ditto grape vine. Transverse, ditto. 



Dogwood. Plane tree. 



Beech. Grape vine. 



Spanish chesnut. Walnut. 



Fig. Ditto longitudinal. 



Asparagus. Artichoke. 



Thistle. Fennel. 



Parsley. Ditto root. 



Sun-flower. Ditto root. 



Agrimony. Eryngo. 



Potato-stalk. Centaurea. 



Indian reed. Indian corn. 



Amaranthus, Bromelia pinguin. 



Campanula. Monk's hood. 



Lavatera. Solidago. 



Mugwort. Chrysanthemum. 



Helianthus. Wormwood. 



Bulrush. Portugal reed. 



Burdoch. 



Field-mustard. Aloe-flower stalk. 



Solomon's seal. Tulip. 



Calamus aromaticus. Buckbean. 



Gourd. Melon. 



Crown imperial. Flower de luce. 



Pine apple. White lily. 



Asparagus. Ragwort. 



Water-flag. Sugar-cane. 



Stems of leaves of hog's fennel. Hemlock. 



Chesnut. Wild turnip. 



Stems of the leaves of red dock. Horse-radish. 



Cabbage. Carrots. 



Roots of phy tolacca. Teasel. 



Carrot. Fennel. 



Stinging-nettle roots curiously variegated. 



Roots of parsley and wormwood variegated. 



Stalks of fern with variations. 



Charcoal. See Phil. Mag. vol. iii. Plate VIII. Fig. 5. 



VI. Worms, Sfc. 



The Gordius aquaticus and lacustris. The common 

 leach, the horse-leach, and the sea-leach. The ascaris 

 vermicularis and lumbricoides. The earth-worm, the 

 sea-worm, the gravel worm. Black, red, and grey 

 snails. The sea lemon. The sea mouse. The nereis 

 noctiluca. The sea-nettle and sea limp. The asterias. 

 Corals, madrepores, milleporcs, cellepores. Zoophytes, 

 such as sponges, &c. 



VII. Saline Solutions. 



All the alkaline, earthy, and metallic salts, form very 

 interesting microscopic objects when dissolved in wa- 

 ter, and allowed to crystallize on a plate of glass by 

 evaporation. 



In order to see in perfection, however, the mode in 

 which these bodies crystallize, it is necessary to illu- 

 minate them with polarized light, which is best done 

 by substituting in place of the mirror four or five plates 

 of glass laid above each other, so as to reflect the light 

 up the tube at an angle of about 56, and to apply to 

 the eye-glass a thin plate of agate or tourmaline for the 

 purpose of analysing the transmitted light. The cry- 

 stallizations will then appear of the most beautiful co- 

 lours, the tints always varying with the thickness of 

 the crystals. 



Description of Microscopic Objects represented in Microico- 

 Plale CCCLXXX. and copied from those given by Mr. P ic objects. 

 Adams. ~*~~Y~^* 



Fig. 1. Is the lobster insect, which is found on the legs P LA TE 



of a fly, and also occurs in books and paper, CCCLXXX. 

 and in plants. 



Fig. 2. Is an insect denominated the Thrips Physapus, 

 which is found on the Dandelion and other 

 plants and flowers. The body is black, and 

 the wings white. 



Fig. 3. Represents the Cimex Striatut, a beautiful in- 

 sect, with its colours very bright, and elegant- 

 ly arranged. It is found in June on the 

 elm tree. 



Fig. 4. Represents the Chryiomela Asparagi, which is 

 found in June on the asparagus, after it has 

 run to seed. 



Fig. 5. Is the Meloe Monoceros found on umbelliferous 

 plants. 



Fig. 6. Represents a scale from the sole fish. 



Fig. 7. Is a section of a weed called the fat hen, which 

 grows among rubbish. 



Fig. 8. Is the section of a reed from Portugal. 



Fig. 9. Is a section of the bamboo. 



Fig. 10. Is a section of the hazel. 



Fig. 11.7 Shew the eggs of moths and butterflies, par- 

 Fig. 12. j ticularly the Phalcena Neustria. 



For farther information on microscopes, the reader is Reference 

 referred to the following works : to work* 



on the mi- 



Fontana, Nauoe Terrestrivm et Cekstium Observalionet, crosc P e> 

 Neap. 1646. Borelli, De vero Telescopii inventore, Hag. 

 1655. Borelli Centuria Obscnat. Microscop. Hag. 1656. 

 Hooke's Micrographia, Lond. 1665. Hartsoecker's Es- 

 say de Diopt. Par. 1694. Huyghens Mem. Acad. Par. 

 1666. Tom. X. p. 427. Huyghens Collect. Acad. Tom. I. 

 p. 281. Hugenii Opera, Tom. II. p. 764. Leuenhoek's 

 Arcana Natures, 2 vol. L. Bat. 1696. Id. Phil. Trans. 

 1673. VIII. 6037, 1740, p 503. Gray, Phil. Trans. 

 1696, 280, 353, 539. Wilson, PA. Trans. 1782, 1241. 

 Butterfield, Ph. Trans. 1678. Divini, Ph. Trans. 1668, 

 p. 842. Bonnani Observations Circa vivenlia qvw in 

 rebus non viventibus reperiuntur, $c. 1691. Baker's 

 Microscope made Easy, 1744. Baker's Employment 

 for the Microscope, 1753. Baker's Calopt. Mic. Philo- 

 sophical Transactions, 1736, p. 442. Lieberkhun, Mem. 

 Acad. Berl. 1745, p. 18. and Collect. Academ. Tom. etp. 

 39. Benj. Martin's Micrographia Nova ; Reading, 

 1742. Martin's Optical Essays. Euler, Nov. Com. 

 Pelrop.lll. and XII. 195,224, p. 363. Euler, Mm. 

 Acad. Berl. 1757- p. 283, 323, 1761, p. 191, 281. 

 1769. p. 105 and 117- ^pinus Nov. Comm. Petrop. 

 IX. 316. JEpinus Nov. Act. Petrop. II. 1784. Hist 

 p. 41. Zeiher, Nov. Comm. Petrop. X. p. 299. Di 

 Torre, Phil. Trans. 1765, p. 246. Smith's Optics, 2 

 vols. Camb. 1738. Hill's Construction of Timber ex- 

 plained by the Microscope, Lond. 1 770. Delebarre's 

 Memoire uir le Microscope. Gleichen vom Sonnen 

 Microscope, Nuremb. 1781. Custance's Machine for ma- 

 king Vegetable Sections, in Phil. Mag. vol. III. p. 302. 

 Adams on the Microscope, 4to. Lond. 1798. Ferguson's 

 Lectures, vol. II. p. 462, 483. Edinburgh Phil. Journ. 

 vol. I. p. 81 ; vol. II. p. 135; and vol. III. No. I. 

 Wollaston, Phil. Trans. 1812. p. 375. Brewster's 

 Treatise on Netv Philosophical Instruments, Edin. 1813. 

 p. 401, 410, 413, 416. (&) 



