352 TABLES FOR PRACTISING 



TABLE VI. 



M \KINC THIN SECTIONS OF BONE AND HAIR, AND MOUNTING 



THEM IN CANADA BALSAM. MOUNTING DIFFERENT PARTS OF 



INSECTS. SEPARATION OF DEPOSITS FROM FLUIDS. 



38. Cut some thin sections of dry bone with the saw and grind them 



to the required degree of tenuity between the hones. 152, 

 218. 



39. Upon microscopical examination they will be found covered with 

 numerous scratches which must be removed by rubbing the sec- 

 tions upon a dry hone, and afterwards upon a piece of plate- 

 glass. 152. 



40. When the sections of bone are sufficiently smooth, mount one of 



them at once in balsam, and treat another section with turpen- 

 tine before immersing it in the balsam. Compare the different 

 microscopical characters of these two specimens, pp. 78, 121. 



41. Cut some thin transverse and longitudinal sections of hair, and 



examine them under the quarter of an inch object-glass. These 

 may be washed in water and mounted in Canada balsam. 



155- 



42. After drying several portions of the insects in a capsule over the 



water-bath (claws, antennae, wings, eyes, spiracles), moisten them 

 with turpentine and mount them in Canada balsam. 143, 



251, 252. 



43. After the deposit suspended in the fluid in the conical glass has 



subsided,* a portion is to be removed with the pipette and 

 placed in a cell, or in the animalcule cage, for examination 

 159, pi. XXII, fig. 141, pi. XVIII, fig. 112. 



44. The' fluid may then be allowed to evaporate spontaneously or by 



placing the slide under a bell-jar over sulphuric acid, pi. XX, 

 fig. 131, and the residue mounted in Canada balsam. 



45. Subject some of the infusoria in the specimen of water on the 



table to examination with a quarter of an inch object-glass. [ 

 248. 



* Small marine shells, sand, &c. 



t Water containing pieces of animal and vegetable matter which had been kept 

 for several days. 



