INTRODUCTION. 



I. LIST OF APPARATUS REQUIRED. 



THE following apparatus is recommended to the student of 

 Elementary Biology : 



1. Two or three scalpels or dissecting knives of different 

 sizes. 



2. Two pairs of forceps, one large and one small. Both pairs 

 should be straight, and should have the tips roughened in order 

 to secure a firmer hold. 



3. Two pairs at least of scissors ; one pair large and strong, 

 for cutting bone and other hard tissues; the other pair small, 

 for fine dissections. A second small pair may have the blades 

 bent at an angle (elbow scissors). In selecting scissors be care- 

 ful to see that they cut quite up to the points of the blades. 



4. A pair of stout needles, firmly mounted in handles. 



5. A pair of the finest sewing needles, mounted in handles: 

 only about a quarter of an inch of the needle should project. 

 They are used for teasing histological preparations. 



6. A seeker, i.e., a blunt needle mounted in a handle, and 

 bent at an angle half an inch from the end. 



7. A metal blow-pipe : and a glass cannula with india-rubber 

 cap. 



8. A pocket lens, containing two or three lenses mounted in 

 a handle, and giving when combined a magnifying power of at 

 least six diameters. A strong " watchmaker's lens " is most 

 useful to those who can hold it at their eye, as leaving both 

 hands free to dissect. 



9. Slides and coverslips, for mounting microscopical speci- 

 mens. The coverslips should be the thinnest sold (No. 1). 

 Square covers are easier to handle than circular. 



10. A blank note-book, for drawing in ; an HB pencil, and 

 a piece of india-rubber. 



11. A cheap pair of compasses, for measuring the dissections.. 



