4 PRACTICAL HISTOLOGY. 



an H.B., and a harder one, e.g., H.H.H. ; both must be of a good 

 quality of lead. After a sketch has been made in pencil, the 

 sketches should be coloured. This may be done either with 



coloured pencils or water-colours. The latter are greatly to 



be preferred. 



12. Slips of white bibulous paper, 3 inches by \ inch, 

 to soak up any superfluous fluid, and to be used for irriga- 

 tion. For irrigation purposes use small triangular slips. 



13. Small glass pipettes, which the student should 

 make for himself by heating in a gas-flame and drawing 

 out a piece of narrow glass-tubing at two places, close to 

 each other, leaving a small part of the tube of the original 

 width, which acts as the bulb of the pipette. Several may 

 be made at a time, and their capillary ends sealed in the 

 flame, and kept until they are required. 



14. A pair of narrow glass rods drawn to a point to 

 tease tissues in such metallic solutions as gold chloride or 

 silver nitrate, which act on metallic instruments. 



15. Labels for the slides. It is well to have a large 

 number of pieces of paper cut, 3 inches by i inch, as 

 temporary labels, on which is written the name of the 

 preparation. Each label is placed under its appropriate 

 slide in a tray. These labels arc merely temporary. This 

 is specially desirable where the slides have to be "ringed," 

 as in this process a permanent label is apt to be displaced 

 or destroyed. In the case of balsam preparations, they 

 may be labelled at once with the small square permanent 

 labels. In every case the preparation should be labelled, 



s IG 't' 8 '~ an( ^ ^ ne l^bel should bear not only the name of the tissue 

 Lifter, or organ, but the direction of the section and the medium 

 in which it is mounted, and, if desired, the date of mount- 

 ing. Labels are now printed so cheaply, that for half-a-crown a 

 student can have a thousand labels printed with his own name. 



16. Reagents. The student should also be provided with the 

 following reagents, placed in a small wooden framework on the 

 work-table. Only those reagents that are most frequently used 

 need be provided for in the framework ; the others can be supplied 

 as required. 



Small bottles two ounces or thereby not too tall, and provided 

 with a glass rod, are necessary. The glass rod has a bulge at the 

 junction of its upper and middle thirds, and this bulge prevents it 

 from falling into the bottle, and, at the same time, acts as stopper 

 for the bottle. Failing this, a piece of glass rod passed through the 

 cork will answer the purpose. 



(1.) Normal Saline, or *6 per cent, salt solution. Dissolve 6 



