226 APPENDIX. 



d. styles ; 



e. ovules. 



Make out under the low power the same parts as far 

 as you can in your section and show on the sketch of 

 your section : 



f. the ovary ; 



g. the lateral attachment of the ovules. 



vi. The median longitudinal section of a ripe pear 

 should also be examined and a series of ripening pears 

 sketched to show stages in the development of the fruit. 



III. Gooseberry (Ribes grossularia). 



vii. Cut transverse sections of a fresh Gooseberry and 

 compare it with your sketch of the preceding lesson. 

 Show on your sketch under a simple lens or low power that 

 the cavity of the ovary is now entirely filled with the 

 young seeds whose stalks are elongated and whose testas 

 have a layer of long transparent cells constituting part of 

 the pulp of the ripe fruit. (The remainder of the pulp is 

 made up by the inner loose tissues of the wall of the ovary.) 



IV. Ash (Frascinus excelsior). 



viii. Examine a fruit of Ash, noting the thin flat expan- 

 sion of the free end. With your knife cut through the 

 basal part about a quarter of an inch from the stalk ; you 

 will find it is hollow. Pass the point only of your knife 

 along the edge for about a quarter of an inch and pull the 

 two valves (each consisting of the united halves of two 

 carpels) asunder so far as to expose the ovary. Show on 

 your sketch the two ovules in each loculus, of which three 



