354 TABLES FOR PRACTISING 



TABLE VIII. 



OF THE USE OF CHEMICAL REAGENTS IN MICROSCOPICAL 



INVESTIGATION. 



53. Test the powder on the glass slide for the presence of carbo- 

 nate,* using the precautions detailed in 309. 



54. Each of the solutions f is to be diluted and separately tested for 

 sulphates, phosphates, and chlorides. 309. 



55. Make some crystals of common salt. 



a. By evaporating a solution rapidly to dryness on a glass 

 slide. 



b. By allowing the solution to evaporate slowly until crys- 

 tals form, when a thin glass cover may be applied and 

 the crystals subjected to microscopical examination. 

 314, pi. XLII, fig. 270. 



56. Fill one of the little bottles with capillary orifices with acetic 

 acid. 307. 



57. Examine some of the white fibrous tissue : under a quarter, 

 before and after the addition of a drop of acetic acid. 297. 



58. Ascertain the effect of a solution of caastic soda upon the cells 



on the slide. 301. 



59. Describe the microscopical characters of the structures upon the 



glass slide,|| and sketch roughly their most important characters. 

 -57- 



60. What is the nature of the substances forming the deposit in the 



glass IT ? 



* Chalk. 



t Sulphate of soda, phosphates of lime, and ammonia and magnesia, and 

 common salt dissolved in water to which a few drops of nitric acid have been 

 added. 



$ The white tendon of a muscle of any small animal, as a mouse, &c. 



Cuticle. 



|| Eye and proboscis of a common fly. 



H Potato-starch, blanket-hair, portions of feathers. 



