350 TABLES FOR PRACTISING 



TABLE IV. 



ON MAKING MINUTE DISSECTIONS. CUTTING THIN SECTIONS OF 

 TISSUES FOR MICROSCOPICAL EXAMINATION. 



22. Trace the nerves in the portion of tissue on the table.* Pin it 



out on a loaded cork, and dissect it beneath the surface of 

 water with the aid of a strong light condensed upon it by the 

 large bull's-eye condenser, in the manner directed in 144, 

 pi. XXI, fig. 133. 



23. Cut some very thin sections of the different soft tissues upon the 

 table.t 147. 



a. Using the scissars. PI. XV, figs. 82, 83, 84. 



b. Using the double-edged knife. PI. XIV, figs. 75, 76, 77. 



c. Using Valentin's knife. PI. XV, figs. 78, 79. 



All these instruments must be well wetted before the section is 

 removed. 147. 



24. Place some small pieces of tissue in the compressorium and 

 dissect them under the microscope in the manner described in 

 149, pi. XXI, figs. 135, 136. 



25. Make some thin sections of wood with the aid of the section 

 cutter alluded to in 156, pi. XXI, fig. 137. 



26. Place some of the sections of pith or bone in thin cells, cover 



them with thin glass, and let them be preserved as dry objects. 



- MI, i5 2 - 

 27 Ascertain the effect of the different preservative solutions upon 



the appearance of the sections in the microscope. 99 to 113-. 



28. Place some of the sections which have been allowed to soak for 

 half an hour in the fluid in which they are to be preserved in 

 thin glass cells, and apply the thin glass cover, observing the 

 precautions detailed in page 117. Remove the fluid outside, 

 and anoint the edge with Brunswick black, which must be 

 applied with a small brush. 



29. Make a thin section of the injected tissue on the table and 

 preserve it in glycerine, or in gelatine and glycerine. 100, 

 105, 106. 



30. Dry another section and mount it in Canada balsam. 143. 



* The skin or muscular tissue of any small animal, a part of a frog. 

 + A piece of tendon, cartilage, kidney, and liver of a sheep. These may be 

 easily obtained of the butcher. 



